slhs 409 exam 1 PNS

two types of cells

somatic - voluntary control

autonomic - involuntary

types of cells in the somatic system (afferent vs efferent)

1. afferent

- sensory receptors

- to brain

2. efferent

- motor

- away from brain

dendron vs axon

dendron receives while axon sends

how do ganglia contribute to PNS

the dendrites in the neurons receive PNS info and its axons send info dorsal to spinal cord and brain stem

trigeminal nerve (V)

efferent: jaw and velum muscles

afferent: oral sensation

facial nerve (VII)

efferent: lip and face muscles

afferent: taste (2/3 tongue)

*affects speech because cannot move face/tongue

Glossopharyngeal nerve (IX)

efferent: tongue (speaking and swallowing)

afferent: taste

vagus nerve (X)

efferent: pharynx and larynx (swallowing and phonation)

afferent: pharynx and external ear

hypoglossal (XIII)

efferent: tongue

afferent: larynx sensation

vestibulocochler (VIII)

efferent: no motor function

afferent: hearing and balance

dorsal column-medial lemniscal pathway

an ascending somatic sensory pathway that mediates information about touch, pressure, vibration, and limb proprioception