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60 Cards in this Set
- Front
- Back
These are glial cells that line the ventricular system and line choroid plexus
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Ependymal cells
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Ependymal cells help produce
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cerebral spinal fluid
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Microglia
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are glial cells that migrate to damaged areas and help dispose pathogens, serving as phagocytes
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These glial cells myelinate central axons
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oligodendrocytes
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Astrocytes help regulate
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microenvironment in response to brain injury
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Name the three sensory cranial nerves
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CN 1 Olfactory assists with smell
CN 2 Optic assists with vision CN 8 Vestibulocochlear assists with hearing and regulating balance |
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List the five Motor Cranial Nerves
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CN 3 Oculomotor
CN 4 Trochlear CN 6 Abducens CN 11 Accessory CN 12 Hypoglossal |
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List the four mixed Cranial Nerves
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CN 5 Trigeminal
CN 7 Facial CN 9 Glossopharyngeal CN 10 Vagus |
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The vertebral arteries changes its names at the level of the pons and becomes the
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basilar artery
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basilar artery becomes the what at the level of the cerebrum
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posterior cerebral artery
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obstruction of the right carotid artery causes weakness and loss of sensation on which side of the body
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left side
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Blockage of vertebral artery distribution affects circulation to which brain areas?
What symptoms arise? |
occipital lobe (visual area), brain stem, and cerebellum
dizziness and may result in loss of vision |
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the internal carotid artery divides into what two arteries
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anterior and middle cerebral arteries
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occlusion of the anterior cerebral artery can result in loss of
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strength and sensation in the lower part of the body
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occlusion of the middle cerebral artery
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affects strength and sensation in the upper regions of the body
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occlusion of the basilar artery at the junction of the two posterior cerebral arteries will result in
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total blindness since the posterior cerebral arteries supply the visual cortex
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occlusion of the vertebral artery may result in
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little or no deficit because of the remaining blood supply from the opposite vertebral artery
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CSF flows from the two lateral ventricles through the two
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interventricular foramina (holes) or Foramen of Monro
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CSF from the third ventricle passes through the what before entering the fourth ventricle
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aqueduct of Sylvius or cerebral aqueduct
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CSF passes outside of the brain through three openings
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foramen of Magendie
and two lateral foramena of Luschka |
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an obstruction of CSF causes
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hydrocephalus
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Epidural hemorrhage can result from a
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skull fracture
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subdural hemorrhage can result from
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tearing the bridging veins that connect the brain and dural sinuses
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the internal capsule is a funnel of motor and sensory fibers that converge upon the brain stem from where
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cerebral cortex
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a lesion in the spinothalamic tract results
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in the loss of pain temperature sensation contralaterally
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a lesion in the sensory area of the cerebral cortex may result in
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contralateral deficit of all the above sensory modalities.
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cerebellar lesions tend to produce
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ataxia and stumbling on same side of lesion in hemisphere, lesion in vermis associated with trunk/ postural dysfunction
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cerebral lesions result in
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contralateral deficits
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upper motor neuron defects (ones that connect the cerebral cortex and anterior horn)
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spastic paralysis, no significant muscle atrophy, fasciculations and fibrillations not present, hyperreflexia, Babinski reflex may be present
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Lower motor neuron defect (beyond the level of UMN, and peripheral nerve neurons)
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flaccid paralysis, significant atrophy, fasciculations and fibrillations present, hyporeflexia, Babinski reflex not present
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Cranial Nerve 7 or facial
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cries when sad, spits when angry
(lacrimates and salivates) master of facial expression |
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in an upper motor neuronal lesion only the area of the face below the eyes is paralyzed because of
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bilateral innervation of the upper face by both hemispheres
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Bell's palsy (nerve 7 palsy of unknown etiology) results in
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difficulty closing the eye
may result in "crocodile tears', with patient having tears when eating |
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pseudobulbar palsy
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difficulty with facial expression, motion of tongue, chewing, swallowing, speech and breathing, inappropriate laughing and crying.
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lesion of the medial longitudinal fasciculus bilaterally would produce
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decreased ability for eyes to look medially
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a repetitive, tremor-like oscillating movement of the eyes
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nystagmus
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Vertical Nystagmus is always abnormal and signals a disturbance in
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brain stem function
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Doll's eye Phenomenon
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turn head suddenly the eyes lag behind in normal individuals with no brain stem damage
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master control for the autonomic system
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hypothalamus
appetite, body temperature, sexual functioning |
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This circuit is believed to be involved in the emotional content of conscious thought
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Papez Circuit
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Papez Circuit provides intercommunicaiton with these structures
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hippocampus, hypothalamus, thalamus and cerebral cortex
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Korsakoff's syndrome
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occurs in alcoholics, memory loss, confusion and confabulation associated with lesions in the mammillary bodies and associated areas
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a region of the brain that is a sensory relay and integrative center connecting the cerebral cortex, basal ganglia, hypothalamus and brain stem
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thalamus
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thalamic pain syndrome
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vague sense of pain without localizing it
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cerebellar disorders have which symptoms
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ataxia: awkward posture and gait, fall to the same side of lesion, poor coordination, dysmetria which is overshooting your reach and dysdiadochokinesia (inability to do rapid alternating movements)
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These symptoms implicate which brain region...
decreased tendon reflexes, asthenia and tremor |
cerebellar region
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The following disorders (Parkinsonism, Chorea, Athetosis and Hemiballismus) affect which brain region:
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Basal Ganglia Disorders
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Parkinsonism
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rigidity, slowness, resting tremor, shuffling gait, mask-like facies, associated with degeneration of basal ganglia and substantia nigra, associated with low dopamine levels
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Chorea
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sudden jerky and purposeless movements such as Huntington's chorea (inherited disorder) or Sydenham's chorea (after rheumatic fever)
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Athetosis
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slow writhing, snake-like movements, especially of the fingers and wrists, often present in diseases of the basal ganglia, distal limbs more affected, associated with MR
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Hemiballismus
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a sudden wild flail-like movement of one arm
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CN 10 lesion may result in
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hoarseness
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CN 10, 12 or 7
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may have difficulty with the KLM sounds "Kuh" and "La", and "MI"
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agnosias
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impaired recognition of previously meaningful stimuli, the most common agnosias are visual and auditory
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apraxias
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complex cerebral motor disabilties
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aphasias
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language dysfunction
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lesions in the dominant hemisphere, anterior region near the motor cortex result in what kind of aphasia
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expressive aphasia
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posterior lesions near the auditory cortex
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receptive aphasia,
inability to understand speech |
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Horner's syndrome
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pupillary constriction, slight ptosis and decreased sweating resulting from interruption of the sympathetic pathways to the eye.
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uncus
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portion of the temporal lobe concerned with sense of smell, Epileptic seizures in this area are acccompanied by unpleasant smells
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