Ch 14, 15, 16 Endocrine System, Nervous System, And Special Senses

Front 1

diabetes insipidus

Back 1

Disorder of insufficient secretion of antidiuretic hormone (ADH) by the posterior portion of the pituitary gland

Diabetes insipidus is characterized by polyuria and polydipsia.

Front 2

diabetes mellitus

Back 2

Chronic metabolic disorder of impaired carbohydrate, protein, and fat metabolism due to insufficient secretion of insulin or insulin resistance of target tissues

Front 3

electrolytes

Back 3

Mineral salts (sodium, potassium, and calcium) that carry an electrical charge in solution

Front 4

glucagon

Back 4

Hormone produced by pancreatic alpha cells that increases the blood glucose level by stimulating the liver to change stored glycogen (a starch form of sugar) to glucose

Front 5

glucose

Back 5

Simple sugar that is the end product of carbohydrate digestion

Front 6

homeostasis

Back 6

The body’s internal state of equilibrium that is maintained by the every-changing processes of feedback and regulation in response to external or internal changes

homeo-: same, alike

-stasis: standing still

Front 7

hormone

Back 7

Chemical substances produced by specialized cells of the body that are released slowly in minute amounts directly into the bloodstream

Front 8

hyperglycemia

Back 8

Greater than normal amount of glucose in the blood;commonly associated with diabetes mellitus

hyper-: excessive, above normal

glyc: sugar, sweetness

-emia: blood condition

Front 9

idiopathic

Back 9

Pertaining to conditions without clear pathogenesis or disease without recognizable cause

idi/o: unknown, peculiar

path: disease

-ic: pertaining to, relating to

Front 10

insulin

Back 10

Hormone produced by pancreatic beta cells that acts to clear sugar (glucose) from the blood by promoting its storage in tissues as carbohydrates (glycogen)

Front 11

mimetic

Back 11

Imitation or simulation of a certain effect

Front 12

sympathomimetic

Back 12

Agent that mimics the effects of the sympathetic nervous system

Front 13

target

Back 13

A structure, organ, or tissue to which something is directed

Front 14

adren/o

-

adrenal/o

Back 14

adrenal glands

Front 15

calc/o

Back 15

calcium

Front 16

crin/o

Back 16

secrete

Front 17

gluc/o

-

glycos/o

-

glyc/o

Back 17

sugar, sweetness

Front 18

home/o

Back 18

same, alike

Front 19

kal/i*

Back 19

potassium (an electrolyte)

Front 20

pancreat/o

Back 20

pancreas

Front 21

parathyroid/o

Back 21

parathyroid glands

Front 22

thym/o

Back 22

thymus gland

Front 23

thyr/o

-

thyroid/o

Back 23

thyroid gland

Front 24

toxic/o

Back 24

poison

Front 25

-crine

Back 25

secrete

Front 26

-dipsia

Back 26

thirst

Front 27

-gen

Back 27

forming, producing, origin

Front 28

-toxic

Back 28

poison

Front 29

-uria

Back 29

urine

Front 30

eu-

Back 30

good, normal

Front 31

exo-

Back 31

outside, outward

Front 32

poly-

Back 32

many, much

Front 33

acromegaly

Back 33

Chronic metabolic disorder characterized by a gradual, marked enlargement and thickening of the bones of the face and jaw

acr/o: extremity

-megaly: enlargement

Front 34

diuresisexophthalmometry

Back 34

Abnormal secretion of large amounts of urine

di-: double

ur: urine

-esis: condition

Front 35

glucagon

Back 35

Hormone secreted by the pancreatic alpha cells

Front 36

glucose

Back 36

Simple sugar that is the end product of carbohydrate digestion

Front 37

glycosuria

Back 37

Presence of glucose in the urine, abnormal amount of sugar in the urine

glycos: sugar, sweetness

-uria: urine

Front 38

Graves disease

Back 38

Multisystem autoimmune disorder characterized by pronounced hyperthyroidism usually associated with enlarged thyroid gland and exophthalmos (abnormal protrusion of the eyeball)

Front 39

hirsutism

Back 39

Excessive distribution of body hair, especially in women

Front 40

hypercalcemia

Back 40

Excessive amount of calcium in the blood

hyper-: excessive, above normal

calc: calcium

-emia: blood

Front 41

hypervolemia

Back 41

Abnormal increase in the volume of circulating fluid (plasma) in the body

hyper-: excessive, above normal

vol: volume

-emia: blood

Front 42

hyponatremia

Back 42

Abnormal condition of low sodium in the blood

hypo-: under, below, deficient

natr: sodium (an electrolyte)

-emia: blood

Front 43

insulinoma

Back 43

Tumor of the islets of Langerhans of the pancreas

insulin: insulin

-oma: tumor

Front 44

obesity

Back 44

Abnormal increase in the proportion of fat cells, mainly in the viscera and subcutaneous tissues of the body

Front 45

panhypopituitarism

Back 45

Total pituitary impairment that brings about a progressive and general loss of hormonal activity

pan-: all

hypo: under, below, deficient

pituitar: pituitary gland

-ism: condition

Front 46

pheochromocytoma

Back 46

Small chromaffin cell tumor, usually located in the adrenalmedulla

Front 47

thyroid storm

Back 47

Crisis of uncontrolled hyperthyroidism caused by the release into the bloodstream of increased amount of thyroid hormone; also called thyroid crisis or thyrotoxic crisis

thyr: thyroid gland

-oid: resembling

Front 48

virile

Back 48

Masculine or having characteristics of a man, especially copulative power

Front 49

virilism

Back 49

Masculinization in a woman or development of male secondary sex characteristics in the woman

Front 50

exophthalmometry

Back 50

Test that measures the degree of forward displacement of the eyeball (exophthalmos) as seen in Graves disease

ex-: out, out from

ophthalm/o: eye

-metry: act of measuring

Front 51

fasting blood glucose (FBG

Back 51

Test that measures blood glucose level after a 12-hour fast

Front 52

glucose tolerance test (GTT)

Back 52

Test that measures the body’s ability to metabolize carbohydrates by administering a standard dose of glucose and measuring glucose level in blood and urine at regular intervals

Front 53

insulin tolerance test

Back 53

Test that determines insulin levels in serum (blood) by administering insulin and measuring blood glucose level in blood at regular intervals

Front 54

protein-bound iodine (PBI)

Back 54

Test that measures the concentration of thyroxine in a blood sample

Front 55

thyroid function test (TFT)

Back 55

Test that determines increase or decrease in thyroid function

Front 56

total calcium

Back 56

Test that measures calcium to detect bone and parathyroid disorders

Front 57

computed tomography (CT) scan

Back 57

Imaging technique achieved by rotating an x-ray emitter around the area to be scanned and measuring the intensity of transmitted rays from different angles

tom/o: to cut

-graphy: process of recording

Front 58

magnetic resonance imaging (MRI)

Back 58

Noninvasive imaging technique that uses radio waves and a strong magnetic field rather than an x-ray beam to produce multiplanar cross-sectional images

Front 59

radioactive iodine uptake (RAIU)

Back 59

Administration of radioactive iodine (RAI) orally as a tracer to test how quickly the thyroid gland takes up (uptake) iodine from the blood

Front 60

thyroid scan

Back 60

Test that involves administration of a radioactive substance that is localized in the thyroid gland and use of a scanner to visualize the gland

Front 61

microneurosurgery of pituitary gland

Back 61

Microdissection of a tumor using a binocular surgical microscope for magnification

Front 62

parathyroidectomy

Back 62

Excision of one or more of the parathyroid glands, usually to control hyperparathyroidism

para-: near, beside; beyond

thyroid: thyroid gland

-ectomy: excision, removal

Front 63

pinealectomy

Back 63

Removal of the pineal body

Front 64

thymectomy

Back 64

Excision of the thymus gland

thym: thymus gland

-ectomy: excision, removal

Front 65

thyroidectomy

Back 65

Excision of the thyroid gland

Front 66

partial vs. subtotal thyroidectomy

Back 66

P - Method of choice for removing a fibrous, nodular thyroid

S- Removal of most of the thyroid to relieve hyperthyroidism

Front 67

cerebr/o

Back 67

cerebrum

Front 68

crani/o

Back 68

cranium (skull)

Front 69

dendr/o

Back 69

tree

Front 70

encephal/o

Back 70

brain

Front 71

gangli/o

Back 71

ganglion (knot or knotlike mass)

Front 72

gli/o

Back 72

glue; neuroglial tissue

Front 73

lex/o

Back 73

word, phrase

Front 74

kinesi/o

Back 74

movement

Front 75

lept/o

Back 75

thin, slender

Front 76

mening/o

-

meningi/o

Back 76

meninges (membranes covering brain and spinal cord)

Front 77

myel/o

Back 77

bone marrow;spinal cord

Front 78

narc/o

Back 78

stupor; numbness; sleep

Front 79

neur/o

Back 79

nerve

Front 80

sthen/o

Back 80

strength

Front 81

radicul/o

Back 81

nerve root

Front 82

thec/o

Back 82

sheath (usually refers to meninges)

Front 83

thalam/o

Back 83

thalamus

Front 84

ton/o

Back 84

tension

Front 85

ventricul/o

Back 85

ventricle (of heart or brain)

Front 86

-algesia

-

-algia

Back 86

pain

Front 87

-asthenia

Back 87

weakness, debility

Front 88

-esthesia

Back 88

feeling

Front 89

-kinesia

Back 89

movement

Front 90

-lepsy

Back 90

seizure

Front 91

-paresis

Back 91

partial paralysis

Front 92

-phasia

Back 92

speech

Front 93

-plegia

Back 93

paralysis

Front 94

-plexy

Back 94

stroke

Front 95

-taxia

Back 95

order, coordination

Front 96

-trophy

Back 96

development, nourishment

Front 97

contra-

Back 97

against

Front 98

pachy-

Back 98

thick

Front 99

para-

Back 99

near, beside; beyond

Front 100

syn-

Back 100

union, together, joined

Front 101

uni-

Back 101

one

Front 102

agnosia

Back 102

Inability to comprehend auditory, visual, spacial, olfactory, or other sensations even though the sensory sphere is intact

a-: without, notg

nos: knowing

-ia: condition

Front 103

asthenia

Back 103

Weakness, debility, or loss of strength

a-: without, not

sthen: strength

-ia: condition

Front 104

ataxia

Back 104

Lack of muscle coordination in the execution of voluntary movement

a-: without, not

tax: order, coordination

-ia: condition

Front 105

aura

Back 105

Premonitory awareness of an approaching physical or mental disorder;peculiar sensation that precedes seizures

Front 106

autism

Back 106

Mental disorder chracterized by extreme withdrawal and an abnormal absorption in fantasy, usually accompanied by an inability to communicate even on a basic level

Front 107

cerebral palsy

Back 107

Self-limiting paralysis due to developmental defects in the brain or trauma during the birth process

cerebr: cerebrum

-al: pertaining to, relating to

Front 108

clonic spasm

Back 108

Alternate contraction and relaxation of muscles

Front 109

closed head trauma

Back 109

Injury to the head in which the dura mater remains intact and brain tissue is not exposed

Front 110

coma

Back 110

Abnormally deep unconsciousness with absence of voluntary response to stimuli

Front 111

concussion

Back 111

Transient loss of consciousness as a result of trauma to the head

Front 112

dementia

Back 112

Broad term that refers to cognitive deficit, including memory impairment

de-: cessation

ment: mind

-ia: condition

Front 113

dyslexia

Back 113

Inability to learn and process written language despite adequate intelligence, sensory ability, and exposure

dys-: bad; painful; difficult

lex: word, phrase

-ia: condition

Front 114

Guillain-Barré syndrome

Back 114

Condition of acute polyneuritis with progressive muscle weakness in extremities

Front 115

herpes zoster

Back 115

Painful, acute infectious disease of the posterior root ganglia of only a few segments of the spinal or cranial nerves; also called shingles

Front 116

Huntington chorea

Back 116

Inherited disease of the CNS that usually has its onset in people between ages 30 and 50

Front 117

hydrocephalus

Back 117

Accumulation of fluid in the ventricles of the brain, causing thinning of brain tissue and separation of cranial bones

Front 118

lethargy

Back 118

Abnormal activity or lack of response to normal stimuli; also called sluggishness

Front 119

neurosis

Back 119

Unconscious conflict that produces anxiety and other symptoms and leads to maladaptive use of defense mechanisms

neur: nerve

-osis: abnormal condition;increase (used primarilywith blood cells)

Front 120

psychosis

Back 120

Major emotional disorder where contact with reality is lost to the point that the individual is incapable of meeting challenges of daily life

psych: mind

-osis: abnormal condition;increase (used primarily with blood cells)

Front 121

spina bifida

Back 121

Defect in which the neural tube (tissue that forms the brain and spinal cord in the fetus) fails to close during embryogenesis

Front 122

meningocele spina bifida

Back 122

Form of spina bifida in which the spinal cord develops properly but the meninges protrude through the spine

mening/o: meninges (membranes covering brain and spinal cord)

-cele: hernia, swelling

Front 123

myelomeningocelespina bifida

Back 123

Most severe form of spina bifida where the spinal cord and meninges protrude through the spine

myel/o: bone marrow;spinal cord

mening/o: meninges(membranes coveringbrain and spinal cord)

-cele: hernia, swelling

Front 124

occulta

Back 124

Form of spina bifida where one or more vertebrae are malformed and the spinal cord is covered with a layer of skin

Front 125

blood-brain barrier

Back 125

Mechanism that blocks specific substances found in the bloodstream from entering the brain

Front 126

cell body

Back 126

Division of a neuron that includes the nucleus, cell organelles, and surrounding cytoplasm, but does not include the axon or dendrites

Front 127

motor neuron

Back 127

Neuron that transmits impulses from the central nervous system (brain or spinal cord) to a muscle or gland; also called efferent neuron

Front 128

nervous impulse

Back 128

Physiological change transmitted through certain tissues, especially nerve fibers and muscles, resulting in activity or inhibition

Front 129

neurology

Back 129

Branch of medicine concerned with diagnosis and treatment of disorders of the nervous system

neur/o: nerve

-logy: study of

Front 130

neurotransmitter

Back 130

Chemical substance that transmits or inhibits nerve impulses at a synapse

Front 131

organelle

Back 131

Cytoplasm structure that provides specialized function for the cell

Front 132

psychiatry

Back 132

Branch of medicine concerned with the diagnosis and treatment of mental disorders

psych: mind

-iatry: medicine;treatment

Front 133

sensory neuron

Back 133

Neuron that transmits impulses from receptors in the skin, sense organs,and internal organs to the central nervous system (brain or spinal cord); also called afferent neuron

Front 134

synapse

Back 134

Junction where a nerve impulse passes from an axon terminal to a neuron, muscle cell, or gland cell

Front 135

paraplegia

Back 135

Paralysis of the lower portion of the trunk and both legs usually as a result of injury or disease of the spine

para-: near, beside; beyond

-plegia: paralysis

Front 136

paresthesia

Back 136

Sensation of numbness, prickling, tingling, or heightened sensitivity

Front 137

poliomyelitis

Back 137

Inflammation of the gray matter of the spinal cord caused by a virus, commonly resulting in spinal and muscle deformity and paralysis

poli/o: gray; gray matter(of brain or spinal cord)

myel: bone marrow; spinalcord

-itis: inflammation

Front 138

quadriplegia

Back 138

Paralysis of all four extremities and usually the trunk

quadri-: four

-plegia: paralysis

Front 139

Reye syndrome

Back 139

Acute encephalopathy and fatty infiltration of the brain, liver and, possibly, the pancreas, heart, kidney, spleen, and lymph nodes; usually seen in children younger than age 15 who had an acute viral infection

Front 140

sciatica

Back 140

Severe pain in the leg along the course of the sciatic nerve felt at the base of the spine, down the thigh, and radiating down the leg due to a compressed nerve

Front 141

syncope

-----vasovagal

Back 141

Temporary loss of consciousness due to the sudden decline of blood flow to the brain; also called fainting

------------------Syncope due to a drop in blood pressure brought on by the response of the nervous system to abrupt emotional stress, pain, or trauma

Front 142

transient ischemic attack (TIA)

Back 142

Temporary interference with blood supply to the brain lasting from a few minutes to a few hours

Front 143

electroencephalography (EEG)

Back 143

Recording of electrical activity in the brain, whose cells emit distinct patterns of rhythmic electrical impulses

electr/o: electricity

encephal/o: brain

-graphy: process of recording

Front 144

electromyography (EMG)

Back 144

Recording of electrical signals (action potentials) that occur in a muscle when it is at rest and during contraction to assess nerve damage

electr/o: electricity

my/o: muscle

-graphy: process of recording

Front 145

lumbar puncture

Back 145

Needle puncture of the spinal cavity to extract spinal fluid for diagnostic purposes, introduce anesthetic agents into the spinal canal, or remove fluid to allow other fluids (such as radiopaque substances) to be injected; also called spinal puncture and spinal tap

Front 146

magnetoencephalography (MEG)

Back 146

Noninvasive test that records electromagnetic activity produced as neurons discharge and maps their pathway through the brain

Front 147

nerve conduction velocity (NCV)

Back 147

Test that measures the speed at which impulses travel through a nerve

Front 148

cerebrospinal fluid (CSF) analysis

Back 148

Series of chemical, microscopic, and microbial tests used to diagnose disorders of the central nervous system, including viral and bacterial infections, tumors, and hemorrhage

cerebr/o: cerebrum

spin: spine

-al: pertaining to, relating to

Front 149

angiography

---------cerebral

Back 149

Radiography of the blood vessels after introduction of a contrast medium

angi/o: vessel (usually bloodor lymph)

-graphy: process of recording

--------Angiography of blood vessels of the brain after injection of a contrast medium; also called cerebral arteriography

cerebr/o: cerebrum

-al: pertaining to, relating to

Front 150

myelography

Back 150

Diagnostic radiological examination of the spinal canal, nerve roots, and spinal cord after injection of contrast medium into the spinal canal

myel/o: bone marrow; spinal cord

-graphy: process of recording

Front 151

positron emission tomography(PET) Scan

Back 151

Scan using computed tomography to record the positrons (positively charged particles) emitted from a radio pharmaceutical and produce a cross-sectional image of metabolic activity in body tissues to determine the presence of disease

Front 152

brain scan

Back 152

Diagnostic procedure using radioisotope imaging to localize and identify intracranial masses, lesions, tumors, or infarcts

Front 153

tractotomy

Back 153

Transection of a nerve tract in the brainstem or spinal cord

Front 154

trephination

Back 154

Technique that cuts a circular opening into the skull to reveal brain tissue and decrease intracranial pressure

Front 155

accommodation

Back 155

Adjustment of the eye for various distances so that the image falls on the retina of the eye

Front 156

acuity

Back 156

Clearness or sharpness of a sensory function

Front 157

adnexa

Back 157

Tissues or structures in the body adjacent to or near a related structure

Front 158

articulate

Back 158

To join or connect together loosely to allow motion between the parts

Front 159

gustation

Back 159

Sense and act of tasting foods, beverages, or other substances

Front 160

humor

Back 160

Any fluid or semifluid of the body

Front 161

labyrinth

Back 161

Series of intricate communicating passages

Front 162

olfaction

Back 162

The act and sense of smelling

Front 163

ossicle

Back 163

Any small bone, especially one of the three bones of the ear

Front 164

photopigment

Back 164

Light-sensitive pigment in the retinal cones and rods that absorbs light and initiates the visual process; also called visual pigment

Front 165

slit lamp

Back 165

Microscope with a specialized light that allows magnification of eye structures—especially the lens, cornea, and iris—and, with additional attachments, the vitreous humor and retina

Front 166

tunic

Back 166

A layer or coat of tissue; also called membrane layer

Front 167

ambly/o

Back 167

dull, dim

Front 168

aque/o

Back 168

water

Front 169

blephar/o

Back 169

eyelid

Front 170

choroid/o

Back 170

choroid

Front 171

core/o

-

pupill/o

Back 171

pupil

Front 172

conjunctiv/o

Back 172

conjunctiva

Front 173

corne/o

Back 173

cornea

Front 174

kerat/o

Back 174

horny tissue; hard; cornea

Front 175

cycl/o

Back 175

ciliary body of eye; circular, cycle

Front 176

dacry/o

-

lacrim/o

Back 176

tear; lacrimal apparatus (duct, sac, or gland)

Front 177

dacryocyst/o

Back 177

lacrimal sac

Front 178

glauc/o

Back 178

gray

Front 179

goni/o

Back 179

angle

Front 180

irid/o

Back 180

iris

Front 181

ocul/o

-

ophthalm/o

Back 181

eye

Front 182

opt/o

-

optic/o

Back 182

eye, vision

Front 183

phac/o

Back 183

lens

Front 184

phot/o

Back 184

light

Front 185

presby/o

Back 185

old age

Front 186

retin/o

Back 186

retina

Front 187

scler/o

Back 187

hardening; sclera (white of eye)

Front 188

scot/o

Back 188

darkness

Front 189

vitr/o

Back 189

vitreous body (of eye)

Front 190

audi/o

Back 190

hearing

Front 191

aur/o

-

ot/o

Back 191

ear

Front 192

labyrinth/o

Back 192

labyrinth (inner ear)

Front 193

mastoid/o

Back 193

mastoid process

Front 194

salping/o

Back 194

tubes (usually fallopian or eustachian [auditory] tubes)

Front 195

staped/o

Back 195

stapes

Front 196

myring/o

-

tympan/o

Back 196

tympanic membrane (eardrum)

Front 197

-opia

-

-opsia

Back 197

vision

Front 198

-tropia

Back 198

turning

Front 199

-acusia

Back 199

hearing

Front 200

-cusis

Back 200

hearing

Front 201

exo-

Back 201

outside, outward

Front 202

hyper-

Back 202

excessive, above normal

Front 203

achromatopsia

Back 203

Severe congenital deficiency in color perception; also called complete color blindness

a-: without, not

chromat: color

-opsia: vision

Front 204

chalazion

Back 204

Small, hard tumor developing on the eyelid, somewhat similar to a sebaceous cyst

Front 205

conjunctivitis

Back 205

Inflammation of the conjunctiva with vascular congestion, producing a red or pink eye; may be secondary to viral, chlamydial, bacterial, or fungal infections or allergy

conjunctiv: conjunctiva

-itis: inflammation

Front 206

convergence

Back 206

Medial movement of the two eyeballs so that they are both directed at the object being viewed

Front 207

diopter

Back 207

Measurement of refractive error

Front 208

ectropion

Back 208

Eversion, or outward turning, of the edge of the lower eyelid

Front 209

emmetropia

Back 209

Normal condition of the eye in refraction in which, when the eye is at rest, parallel rays focus exactly on the retina

Front 210

entropion

Back 210

Inversion, or inward turning, of the edge of the lower eyelid

Front 211

epiphora

Back 211

Abnormal overflow of tears

Front 212

exophthalmos

Back 212

Protrusion of one or both eyeballs

Front 213

hordeolum

Back 213

Localized, circumscribed, inflammatory swelling of one of the several sebaceous glands of the eyelid, generally caused by a bacterial infection; also called sty

Front 214

metamorphopsia

Back 214

Visual distortion of objects

+++

meta-: change; beyond

+++

morph: form, shape, structure

+++

-opsia: vision

Front 215

nyctalopia

Back 215

Inability to see well in dim light; also called night blindness

nyctal: night

-opia: vision

Front 216

nystagmus

Back 216

Involuntary eye movements that appear jerky and may reduce vision or be associated with other, more serious conditions that limit vision

Front 217

papilledema

Back 217

Edema and hyperemia of the optic disc usually associated with increased ocular pressure resulting from intracranial pressure; also called choked disc

Front 218

photophobia

Back 218

Unusual intolerance and sensitivity to light

phot/o: light

-phobia: fear

Front 219

presbyopia

Back 219

Loss of accommodation of the crystalline lens associated with the aging process

presby: old age

-opia: vision

Front 220

retinopathy

-------diabetic

Back 220

Any disorder of retinal blood vessels

retin/o: retina

-pathy: disease

----------Disorder that occurs in patients with diabetes and is manifested by small hemorrhages, edema, and formation of new vessels on the retina, leading to scarring and eventual loss of vision`

Front 221

trachoma

Back 221

Chronic, contagious form of conjunctivitis common in the southwestern United States that typically leads to blindness

Front 222

visual field

Back 222

Area within which objects may be seen when the eye is in a fixed position

Front 223

anacusis

Back 223

Deafness; also called anacusia

an-: without, not

-acusis: hearing

Front 224

conduction impairment

Back 224

Blocking of sound waves as they are conducted through the external and middle ear (conduction pathway)

Front 225

labyrinthitis

Back 225

Inflammation of the inner ear that usually results from an acute febrile process

labyrinth: labyrinth (inner ear)

-itis: inflammation

Front 226

Ménière disease

Back 226

Disorder of the labyrinth that leads to progressive loss of hearing

Front 227

otitis externa

Back 227

Infection of the external auditory canal

ot: ear

-itis: inflammation

Front 228

presbyacusis

Back 228

Impairment of hearing resulting from old age; also called presbyacusia

presby: old age

-acusis: hearing

Front 229

pressure-equalizing (PE) tubes

Back 229

Tubes that are inserted through the tympanic membrane, commonly to treat chronic otitis media; also called tympanostomy tubes or ventilation tubes

Front 230

tinnitus

Back 230

Perception of ringing, hissing, or other sounds in the ears or head when no external sound is present

Front 231

vertigo

Back 231

Hallucination of movement, or a feeling of spinning or dizziness