Lab 4 Cerebellum

Question 1

• Superior cerebellar peduncle inputs and outputs

Answer 1

o Inputs: ? we don’t know. Locus ceruleus
o Outputs: interposed nuclei (globose, emboliform) through SCP decussates ventral to IC. Terminates in red n. contralateral
o Output 2: Dentate n. Through SCP decussates ventral to IC. Terminates in VL n. of thalamus contra.

Question 2

• Middle cerebellar peduncle inputs and outputs

Answer 2

o Input: pontocerebellar tract. Origin pontine n. course decussates immediately to enter MCP. Terminates in granule c of cerebellar hemisphere. Contra.
o Output: none

Question 3

• Corticopontine tract

Answer 3

o Origin: cortex, all lobes. course: IC (A/P), cerebral peduncles, pons. Terminates pontine n. Ipsi.

Question 4

• Inferior cerebellar peduncle

Answer 4

o Input: dorsospinal cerebellar. Origin: clarke’s column. Course: dorsolateral sc and medulla, enters cerebellum thru ICP. Terminates granule cell of vermis and intermediate zone. Ipsi
o Input: cuneocerebellar. Origin: Accessory cuneate n. Course: dorsolateral medulla cerebellum thru ICP. Terminate: granule cell vermis and intermediate. Ipsi
o Input: olivocerebellar. Origin: inferior olivary. Decussated immediately to enter ICP. Terminate: purkinje cell cerebellum. Contra
o Input: vestibulocerebellar. Vestiular n. through ICP. Gran cell of flocculus and nodulus. Ipsi.
o Output. Fastigial n. ICP. Vestibular n or reticular formation. Bilateral