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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