Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
50 Cards in this Set
- Front
- Back
flaccid
|
displaying lack of muscle tone; limp, floppy
|
|
photophobia
|
inability to tolerate light
|
|
reflex
|
an automatic response to stimuli
|
|
tone
|
tension present in a muscle at rest
|
|
vertigo
|
an illusion of movement, usually rotation
|
|
central nervous system (CNS)
Parts |
brain and spinal cord
|
|
peripheral nervous system
|
cranial and spinal nerves
|
|
Acetylcholine
Def Source Action |
-major transmitter of the parasympathetic nervous system
- Many areas of the brain; autonomic nervous system -Usually excitatory; parasympathetic effects sometimes inhibitory (stimulation of heart by vagal nerve) |
|
Serotonin
Def Source Action |
Brain stem, hypothalamus, dorsal horn of the spinal cord Inhibitory, helps control mood and sleep, inhibits pain pathways
|
|
Dopamine
Source Action |
-Substantia nigra and basal ganglia
- Usually inhibits, affects behavior (attention, emotions) and fine movement |
|
Norepinephrine
Def Source Action |
-major transmitter of the sympathetic nervous system
-Brain stem, hypothalamus, postganglionic neurons of the sympathetic nervous system -Usually excitatory; affects mood and overall activity |
|
Gamma-aminobutyric acid
|
- Spinal cord, cerebellum, basal ganglia, some cortical areas
- Excitatory |
|
Enkephalin, endorphin
|
-Nerve terminals in the spine, brain stem, thalamus and hypothalamus, pituitary gland -
Excitatory; pleasurable sensation, inhibits pain transmission - |
|
Frontal Lobe
Location Major Functions |
—the largest lobe, located in the front of the skull. The major functions of this lobe are concentration, abstract thought, information storage or memory, and motor function. It also contains Broca's area, critical for motor control of speech. The frontal lobe is also responsible in large part for a person's affect, judgment, personality, and inhibitions
|
|
Parietal Lobe
Location Major Functions |
—a predominantly sensory lobe located near the crown of the head. This lobe analyzes sensory information and relays the interpretation of this information to the thalamus and other cortical areas. It is also essential to a person's awareness of the body in space, as well as orientation in space and spatial relations
|
|
Temporal Lobe
Location Major Functiions |
—contains the auditory receptive areas located around the temples. The temporal lobe contains a vital area called the interpretive area that provides integration of somatization, visual, and auditory areas and plays the most dominant role of any area of the cortex in thinking
|
|
Occipital Lobe
Location Major Functions |
—the posterior lobe of the cerebral hemisphere located at the lower back of the head, is responsible for visual interpretation
|
|
Upper Motor Neuron Lesions
|
Loss of voluntary control
Increased muscle tone Muscle spasticity No muscle atrophy Hyperactive and abnormal reflexes |
|
Lower Motor Neuron Lesions
|
Loss of voluntary control
Decreased muscle tone Flaccid muscle paralysis Muscle atrophy Absent or decreased reflexes |
|
cerebellum
action |
coordination, balance, and timing of all muscular movements that originate in the motor centers of the cerebral cortex.
|
|
basal ganglia
action |
play an important role in planning and coordinating motor movements and posture
|
|
Decortication
|
is the result of lesions of the internal capsule or cerebral hemispheres
the patient has flexion and internal rotation of the arms and wrists and extension, internal rotation, and plantar flexion of the feet |
|
Decerebration
|
the result of lesions at the midbrain, is more ominous than decortication.
The patient has extension and external rotation of the arms and wrists and extension, plantar flexion, and internal rotation of the feet |
|
thalamus
action |
integrates all sensory impulses except olfaction
It plays a role in the conscious awareness of pain and the recognition of variation in temperature and touch. The thalamus is responsible for the sense of movement and position and the ability to recognize the size, shape, and quality of objects. |
|
Visual Agnosia
Affected Cerebral Area |
Occipital lobe
|
|
Auditory Agnosia
Affected Cerebral Area |
Temporal lobe (lateral and superior portions
|
|
Tactile Agnosia
Affected Cerebral Area |
Parietal lobe
|
|
Body parts and relationships Agnosia
Affected Cerebral Area |
Parietal lobe
|
|
Auditory-receptive Aphasia
area of brain involved |
Temporal lobe
|
|
Visual-receptive Aphasia
|
Parietal-occipital area
|
|
Expressive speaking Aphasia
|
Inferior posterior frontal areas
|
|
Expressive writing aphasia
|
Posterior frontal area
|
|
craniotomy
|
a surgical procedure that involves entry into the cranial vault
|
|
craniectomy
|
a surgical procedure that involves removal of a portion of the skull
|
|
Cushing's response
|
brain's attempt to restore blood flow by increasing arterial pressure to overcome the increased intracranial pressure
|
|
Cushing's triad
|
three classic signs—bradycardia, hypertension, and bradypnea—seen with pressure on the medulla as a result of brain stem herniation
|
|
decerebration
|
an abnormal body posture associated with a severe brain injury, characterized by extreme extension of the upper and lower extremities
|
|
decortication
|
an abnormal posture associated with severe brain injury, characterized by abnormal flexion of the upper extremities and extension of the lower extremities
|
|
epidural monitor
|
a sensor placed between the skull and the dura to monitor intracranial pressure
|
|
epilepsy
|
a group of syndromes characterized by paroxysmal transient disturbances of brain function.
|
|
herniation
|
abnormal protrusion of tissue through a defect or natural opening
|
|
intracranial pressure
|
pressure exerted by the volume of the intracranial contents within the cranial vault
|
|
microdialysis
|
procedure in which an intracranial catheter is inserted near an injured area of brain to measure lactate, pyruvate, glutamate, and glucose levels
|
|
ventriculostomy
|
a catheter placed in one of the lateral ventricles of the brain to measure intracranial pressure and allow for drainage of fluid
|
|
neurologic system may be decreased or absent due to
|
Sepsis
hypovolemia myocardial infarction respiratory arrest hypoglycemia electrolyte imbalance drug and/or alcohol overdose encephalopathy ketoacidosis |
|
ICP
Clincial manifestations |
change in LOC
slow speech/delay in verbal response restlessness |
|
ICP
Clincial manifestations |
change in LOC
slow speech/delay in verbal response restlessness |
|
ICP causes
|
Decreased Cerebral Blood Flow
Cerebral Edema |
|
ICP
clinical manifestations early |
The earliest sign of increasing ICP is a change in LOC. Slowing of speech and delay in response to verbal suggestions are other early indicators.
|
|
ICP
Clinical manifestations Later |
abnormal respiratory and vasomotor responses.
Pulse and resp rate decrease or bcome erratic BP and temp Increase Widening pulse pressure Vomitting loss of brainstem reflexs |