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neuro review


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What does the frontal lobe control
judgements, emotions, motor aspects of speech, primary motor cortex for voluntary muscle activation
what is the function of the parietal lobe
receives fibers with sensory infor about touch, proprioception, temp and pain from the other sidce of the body
What is the termporal lobe responisble for?
auditory info, and language comprehension
The occiptal lobe is the center for what?
visual info
What does the cerebellum coordiante?
muscle function
What is included in the brainstem
midbrain, pons, and medulla its the respiratory and cardiac center, nerve pathways to the brain
What does the thalamus control
integrate and relay sensory info from the face, retina, cochlea and taste receptors, interprets sensation of touch pain and temp
what are characteristics of the sympathetic nervous system?
Dialated pupils
Elevated HR
Epinephrine nad norepinephrine
increased BP
Constriction of skin and ab arteries
What are characteristics of the parasympathetic nervous system?
constricted pupils
lowers hr and respiratory rate
increased peristalsis
ACH secreted
decreases BP
relaxation of skin and ab arterioles
Olfactory smell
Optic vision acuity
Oculomotor-eye function
Trochlear-Eye function
Trigminal, snsory of the face, chweing
Abducens, eye function
Facial expression, wrinke forehead, taste anterior tongue
Vesibulocochlear-auditory acuity, balance and postural responses
Glosspharyngeal,taste on posterior 33%of the scale
Vagus, cardiac respiratory reflexes
Spinal Accessory-strnght of trapezius and SCM muscles
Hypoglossal-motor function fo the tongue
Characteristics of anterior cerebral stroke
lower extremitiy more involved than upper, contralateral hempariesis,
Sensory deficits
characteristics of posterior cerebral stroke
contralateral sensory loss, transient contralateral hemipariesis
characteristics of middle cerebral artery stroke
upper extremeity more involved than lower,contralateral sensory loss
Descending tracts
originates lateral vestibular nucleus, which lies in the floor of the fourth ventricle,
descend the length of the spinal cord in the ventral and lateral funiculi without crossing, enter laminae VIII and IX of the anterior horn, and end upon both alpha and gamma motor neurons, which innervate ordinary muscle fibres and fibres of the muscle spindle
The Corticospinal Tract is the largest descending pathway in man. It originates in part from the pyramidal cells in the cortex of each cerebral hemisphere and courses through the internal capsule, then through the medullary pyramids. At this point some 80% of the fibres from each hemisphere, decussate in the pyramidal decussation, and continue to descend in the lateral white column of the opposite side. The remaining 20% continue down ipsilaterally, in the ventro-medial white column, to innervate bilaterally, the more medially located motor neurones of the axial and proximal muscles.

The crossed fibres in the lateral white columns comprise both sensory axons (from post-central gyrus and parietal association areas), and motor axons (from precentral gyrus and prefrontal areas). The sensory axons project into the dorsal horn of the grey matter, to effect feedback regulation of the input pathways. The motor axons terminate on motor neurones of the distal muscles, either directly, or indirectly via interneurones.
Lesion of the medial corticospinal tracts results in???
this lesion results in inability to sit upright walk or climb.

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