Term
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Definition
| inputs from above the spinal cord |
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Term
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Definition
| interneurons that provide ready-made circuits for lots of coordinated movements |
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Term
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Definition
| sensory motor cortex-> pons -> cerebellum -> VL nucleus of thalamus -> motor cortex |
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Term
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Definition
| cortex -> basal ganglia -> VL nucleus of thalamus -> area 6 (premotor) and prefrontal cortex |
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Term
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Definition
| dorsiflexion and fanning of the toes on stroking of the foot |
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Term
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Definition
| from red nucleus -> lateral part of spinal gray = proximal and distal muscles, especially flexors. interrupt = severe impairment of independent distal extremity and hand movements |
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Term
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Definition
| from cerebral cortex layer 5 -> pyramidal tract (medullary pyramids), decussate in medulla, contralateral ventral horn of spinal cord. interruption = decreased agility speed power of muscle movements, especially handsd. fractionary movements lost. |
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Term
| ventromedial brainstem path |
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Definition
| control of balance, posture and orienting movements with axial musculature |
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Term
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Definition
| brain to spinal cord paths |
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Term
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Definition
| cells with axons in the long motor tracts |
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Term
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Definition
| alpha motor neuron that directly innervates a muscle -> damage to this = flaccid paralysis |
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Term
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Definition
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Term
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Definition
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Term
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Definition
| cut higher up on corticospinal tract, before it gets to any other path = arms flexed in bc leaves rubrospinal intact |
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Term
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Definition
| rubrospinal and corticospinal = extended limbs bc ventromedial path acts unopposed |
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Term
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Definition
| shortest period between the ortho and anti-dromatic spikes visible at the cell body, its exactly twice the andtidromatic latency plus the refractory period of the axon (which is very short) |
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Term
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Definition
| time between provoking an antidromatic spike and when the spike actually occurs |
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