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Transcript
Descending Spinal Tracts
• The Lateral Pathways (Cont’d)
– The Effects of Lateral Pathway Lesions
• Experimental lesions in corticospinal and
rubrospinal tracts
– Fractionated movement of arms and hands
• Damage of corticospinal tract
» Paralysis on contralateral side
The Motor Neurons -and interneurons
located in gray matter of ventral “horn”
Lateral corticospinal tract synapses on motor neurons
that move muscles in limbs and digits in contralateral
side.
Ventral corticospinal tract synapses on motor neurons
of midline muscles (trunk) in ipsi side.
strokes
• Severe immediate deficit
– Spinal shock – hypotonia
• Reflex recovery (good or bad?)
– Hypertonia, hyperreflexia
• CLONUS (CYCLES)
• Babinski sign
3