Pathways, vestibular, ocular
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each of the black spaces below before clicking
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| show | Operation of spinal reflex systems -> cortical damage/stroke btwn cerebral cortex/brainstem -> spastic palsy, spinal damage/trauma btwn brainstem and spinal cord -> flaccid paralysis
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| show | Reticulospinal, vestibulospinal, tectospinal, corticospinal tracts -> control the axial skeleton via bilateral innervation of alpha motoneurons
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| show | From reticular formation -> cranial projection (wakefulness), caudal projection (postural mvmt for wakefulness) -> principal route for spinal CPG activation controlled by cerebral cortex -> whole body axial posture/mvmt
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| What does the vestibulospinal system control? | show 🗑
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| show | From superior colliculus w/ map of contralateral visual space -> generates rapid sensory orientation mvmts (saccades) btwn head/eyes for visual information processing -> don't pass through thalamus (quick responses) -> axial oculomotor/neck muscles
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| show | From M1 -> part of the pyramidal tract -> voluntary motor control of axial skeleton -> most decussate (lateral corticospinal tract -> appendicular limbs), 10% of fibres don't decussate (anterior corticospinal tract -> axial trunk)
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| show | Midbrain cerebral peduncles (ipsilateral) -> columns, pons -> variable position, medulla (10% don't decussate) -> pyramids, spinal cord -> corticospinal tract
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vykleung
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