Term
| visual pathway for motor reflexes |
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Definition
optic n -> optic chiasm -> LGN -> pretectal area & rostral colliculus
posture fxn |
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Term
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Definition
| light -> pretectal nuc -> EW nuc -> oculomotor n -> ciliary ganglion -> pupil |
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Term
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Definition
| optic tract -> pretectal nuc -> EW nuc -> ciliary ganglion -> ciliary & sphincter muscles of iris |
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Term
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Definition
| rostral colliculus -> tecto-oculomotor tract-> CN III nuc -> medial rectus muscle |
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Term
| reflex orienting of the eyes |
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Definition
| optic tract -> rostral colliculus -> tecto-oculomotor tract -> CN III, IV, VI nuclei |
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Term
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Definition
| optic n -> optic chiasm -> optic tract -> brachium of rostral colliculus -> rostral colliculus -> nuc of CN VII -> CN VII -> orbicularis oculi |
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Term
| eye voluntary motor control (horizontal gaze) |
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Definition
frontal eye fields (region 8 of motor cortex) -> PPRF -> CN VI nuc -> CN VI -> lateral rectus
OR CN VI nuc -> CN III -> medial rectus |
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Term
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Definition
| vestibular nuc -> MLF -> PPRF -> CN III & VI nuc -> lateral and medial rectus muscles |
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Term
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Definition
| occipital cortex -> corona radiata -> cerebral peduncle -> PPRF -> CN III & VI |
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Term
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Definition
receptor stim -> DRG -> fasciculus gracilis -> nucleus gracilis -> ML -> VCL -> internal capsule -> sensory cortex (lower body)
upper body: cuneate fasciculus and nucleus instead |
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Term
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Definition
| olf filaments -> olf bulb -> mitral cell -> lat olf tract -> amygdala & piriform lobe |
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Term
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Definition
| CN VII, IX, X -> solitary tract -> solitary nuc -> parabrachial nuc -> amygdala & hypothalamus or VCM -> cerebral cortex |
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Term
| myotatic reflex (stretch reflex) |
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Definition
| extensor 1a afferents from muscle -> spinal cord -> extension (excitatory) or flexion (inhibitory) |
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Term
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Definition
movement
cortex -> interior capsule -> cerebral peduncle -> motor nuc of CNs V, VII, XII & reticular formation & red nuc, nuc ambiguus |
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Term
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Definition
| widespread cortical areas -> caudate & putamen -> globus pallidus -> ventrolateral nuc -> motor cortical areas |
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Term
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Definition
substantia nigra -> caudate & putamen
uses dopamine, for movement, implicated in parkinsons disease |
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Term
| cerebellar pathway: fine motor control |
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Definition
| hemispheres -> dentate nuc -> rostral cerebellar peduncle -> red nuc -> ventrolateral nuc |
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Term
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Definition
golgi tendon organ, measures load, inhibit further extension and excite flexion
1b fiber |
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Term
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Definition
| afferents go in and inhibit extension and excite flexion on one side, does opposite on opposite side |
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Term
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Definition
dorsolateral: fine motor control
ventromedial: proximal m., balance, righting (incl tectospinal, lateral vestibulospinal, reticulospinal) |
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Term
| light tough, proprioception |
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Definition
| CN V -> sensory nuclei -> VTTT -> VCM -> internal capsule -> sensory cortex |
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Term
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Definition
CN V -> spinal nuc of V -> VTTT -> VCM -> sensory cortex
OR VTTT -> IL -> internal capsule -> widespread areas |
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Term
| pain, temp, gross touch (alternate) |
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Definition
| spinal nuc of V -> reticular formation -> IL -> internap capsule -> widespread areas of cerebral cortex |
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Term
| lateral vestibulospinal tract |
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Definition
input: vestibular, cerebrum
LVN -> ventromedial tract - > alph/gamma motorneurons -> proximal limbs -> + extensors, - flexors
ipsilateral |
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Term
| medullary reticulospinal tract |
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Definition
input: cerebral cortex, cerebellum, spinal cord
reticular formation -> ventromedial tract -> alpha/gamma motorneurons -> - extensors, + flexors |
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Term
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Definition
input: CN II, auditory, somatosensory
rostral colliculus -> ventromedial tract -> eyes, head
contralateral |
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Term
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Definition
| motor cortex -> corona radiata -> internal capsule -> cerebral peduncle -> pyramids -> decussate -> 90% lateral corticospinal/10% ventral corticospinal -> contralateral/ipsilateral |
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Term
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Definition
| cochlea -> spiral gang -> superior olive -> trapezoid body -> ventral or dorsal cochlear nuc -> lateral lemniscus -> caudal coliculus -> brachium of caudal colliculus -> medial geniculate nuc -> auditory cortex |
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Term
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Definition
turn head to L -> activate L canal -> L vestibular nuc -> MLF tract ->
CN II nuc -> L medial rectus
& CN VI -> R lateral rectus |
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Term
| ventral ascending spinothalamic tract |
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Definition
pain temp gross touch -> DRGC -> tract cells -> spinothalamic tract -> VCL -> internal capsule -> sensory cortex
or spinothalamic tract -> IL -> internal capsule -> widespread cortical areas |
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Term
| ventral ascending spino-reticulo-thalamic |
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Definition
pain temp gross touch -> DRGC -> tract cells -> spinothalamic tract -> reticular formation -> IL -> internal capsule -> widespread cortical areas
or reticular formation -> hypothalamus |
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Term
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Definition
| intermediate zone -> interpositus -> rostral cerebellar peduncle -> red nuc & ventrolateral nuc |
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Term
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Definition
| flocculonodular -> vestibular -> LVST -> ext motorneurons |
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