Point 4 Intro Pathway Deficits Spindles Summary Problems Contents Anatomy

LET'S SUMMARIZE SOME DIFFICULT (AND CONFUSING??) MATERIAL INTO A "SIMPLE RULE" A LESION OF THE LCST RESULTS IN IPSILATERAL WEAKNESS AND SPASTICITY OF THE AFFECTED MUSCLES AT AND BELOW THE LEVEL OF THE LESION. LET'S REVIEW THE LATERAL CORTICOSPINAL TRACT! CELLS OF ORIGIN contralateral motor cortex LOCATION lateral funiculus TERMINATION ipsilateral ventral horn LESION DEFICIT(S) ipsilateral muscle weakness (loss of excitatory drive) and increased tone and deep tendon reflexes in muscles innervated by spinal segments at and below the level of the lesion. Also, a Babinski sign.