Medulla

Question 1

Pyramidal Tract function

Answer 1

mediates voluntary control of movement of the limbs and motor functions of CN 9,10,12

Question 2

Pyramidal tract injury

Answer 2

upper motor neuron paralysis affecting the limbs and disruption of motor functions associated with CN 9,10,12

Question 3

Medial lemniscus function

Answer 3

transmits conscious proprioception, pain, and temp from the body and limbs to the thalamus (and then to the cortex) via the DCP pathway

Question 4

medial longitudinal fasciculus (MLF)

Answer 4

signals from descending component result in changes in position of the head in response to vestibular input; likewise, ascending component regulates position of eyes in response to vestibular input

Question 5

Lateral spino thalamic tract function

Answer 5

mediates pain and temp sensation from the body

Question 6

inferior olivary nucleus

Answer 6

a key relay nucleus mediating info from red nucleus and spinal cord to cerebellum

Question 7

nucleus ambiguus

Answer 7

origin of motor outputs from CN9 and 10 to larynx and phaynx

Question 8

Caudal medulla (fused baby feet)

Answer 8

most similar to spinal cord, site of decussation of pyramids,

Question 9

Rostral medulla (open)

Answer 9

inferior cerebellar peduncle (used in DCST) MLF located here (coordinates nuclei of 3, 4, )