Nervous System Exam A&P I

CNS

Brain and spinal cord

PNS

12 pairs cranial nerves

31 pairs spinal nerves

Sensory

Afferent

Motore

Efferent

Sympathetic

Fight or flight

Parasympathetic

Rest and digest

Somatic

Voluntary

Autonomic

Involuntary

Dendrites

Graded potential to cell body

-55 sets

off action potential

Steps

AP, Depolaraization, Repolarization, HYPERPOLARIZATION

Absolute

No AP

Relative

If strong enough

Excitatory

Depolarization

Inhibitory

Hyperpolarization

Hypothalamus

Controls temperature

Arbor vitae

Cerebellar White Matter

Dura

Periosteal, Meningeal

Postcentral gyrus

Primary sensory

Precentral gyrus

Motor

Cerebral cortex

Executive suite

CSF

lightens head and buoyancy

Visceral controls

Upset stomach and bladder

Proprioceptors

Where your body is in space

Olfactory

Smell

Cervical plexus

Phrenic Nerve

Brachial PLexus

Roots Trunks Divisions Chords Branches

Ipsilateral

Same-side, weight bearing

Vagus

X Under the tongue

Craniosacral

Parasympathetic

Thoracolumbar

Sympathetic

Negative

Less Na