Spinal Cord Pathways Flashcards
pain, temperature, itching, tickling, deep pressure and crude touch travel together in what pathway?
spinothalamic
what is meant by “upper” motor neuron?
having to do with the CNS
where is the alpha motor neuron located?
ventral gray matter (ventral root)
what motor neuron is associated with voluntary pathway?
alpha
what is the motor humonculous?
places where voluntary motion comes from in the cerebral cortex
what are extrapyramidal symptoms?
older terminology for basal ganglia
what is the internal capsule?
motor white matter pathway
what is the decussation of pyramid?
where neuronal pathways cross in the medulla
what does lateral corticospinal pathway control?
distal, fine motor function
what does anterior corticospinal pathway control?
proximal motor function of extremities
what does it mean to decussate?
cross over
what is the pathway in the basal ganglia?
input into caudate and putamen
output through globus pallidus and substantia nigra
what is dysmetria
inability to coordinate movement
what senses travel along the dorsal pathway?
proprioception vibration light pressure discriminative touch two-point discrimination
how many neurons does sensory pathway have?
3
where does spinothalamic cross?
at level of spinal column
2nd order neuron
what does VPL mean?
ventroposteriorlateral area of thalamus
what information does the gracile fasciculus carry?
input from lower extremities
-standing on the “grass”-medially
what information does the cuneate fasciculus carry?
input from upper extremities
-laterally located
where does the dorsal pathway cross at?
area of the medulla
- gracile or cuneate nucleus
- where the 1st order nucleus synapses with 2nd order nucleus
