Lower motor systems: cranial GSE

what are the 3 classifications of cranial LMNs

1. General somatic efferent

2. Special visceral efferent

3. General visceral efferent

what is the function of General somatic efferent LMNs

voluntary skeletal muscle movement

there are not long collumns of LMNs spanning the brainstem and spinal cord because of what

• neurobiotaxis

• columnar fragmentation

thanks to neurobiotaxis and columnar fragmentation what is produced

cranial nerve nuclei

what are the locations of the GSE nuclei(red) from rostral to caudal

• rostral colliculus

• caudal colliculus

• caudal to rostral cerebellar peduncle

• obex 

what cranial nerves synapse at the GSE nuclei from rostral to caudal

• oculomotor nerve (CN3)

• trochlear nerve (CN4)

• abducens nerve(CN6)

• hypoglossal nerve(CN12)

what is the target of CN 3,4,6

the extra ocular muscles

what is the target of CN 12

the muscles of the tongue

The motor nucleus of the oculomotor nerve is located at the level of the:

rostral colliculus

The motor nucleus of the hypoglossal nerve is located at the level of the:

obex