Neuroanatomy - ANS
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Primary control center of ANS | hypothalamus
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ANS input from | cortex is largely conveyed to hypothalamus via the amygdala
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pupillary constriction centers in | midbrain
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micturition centers in | pons
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cardiac & pulmonary centers in | medulla
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heart afferents | vagal & glossopharyngeal from carotid body & sinus to solitary nucleus
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Pain with sympathetics | T1-T4 on left
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Control centers in medulla react to input from | hypothalamus & baro- & chemo-receptors
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Parasympathetics | dorsal motor X
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parasympathetics pass to | ganglion cells
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ganglion cells innervate primarily | nodes slowing the heart
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sympathetics T1-T4 reach heart directly from | chain or ascending then descedning as cardiopulmonary splanchnic nn.
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parasympathetics cause | erection
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sympathetics cause | emission
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somatic reflexes cause | ejaculation
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bladder pain travels with | lumbar & pelvic splanchnics (ps) & ascends in the spinothalamic tract
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bladder fullness | in wall with ps to spinothalamic tract
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bladder fullness in | trigone with ps to dorsal columns
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bladder parasympathetics cause | contraction of internal urethral sphincter & relaxation of detrusor
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bladder somatic motor fibers from the | Onuf nucleus
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Onuf nucleus contracts the | external sphinter via the perineal branch of the pudendal n.
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Bladder cerebral control centers are in the | superior frontal gyrus
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Bladder pontine centers | contract the external urethral sphincter & relax the external uretheral sphincter & contract the detrusor
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Bladder low level distension stimulates | Onuf nucleus
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High level distention inhibits | Onuf nucleus & sympathetic
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Parkinson's disease | resting tremor
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Parkinson's disease | difficulty initiation movement
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Parkinson's disease due to | loss of dopaminergic neurons in substania nigra
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Huntington's disease (Chorea) | inability to stop moving
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Huntington's diease (Chorea) due to | genetic defect which causes cellular loss in the striatum (especially the caudate nucleus)
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Hemiballismus | flailing of limbs on 1 side
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Hemiballismus due to | damage to the subthalamic nucleus
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Created by:
JYarger
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