Autonomic Nervous System Flashcards
somatic motor
(efferent) voluntary control of skeletal muscle, travels from the brain to the rest of the body
somatic sensory
(afferent) “normal” sensations including pain, pressure, temperature, and position; from body structures to brain
autonomic nervous system
also known as the visceral nervous system
autonomic motor
involuntary control of smooth muscles
autonomic sensory
visceral sense; pains tend to be achy and hard to pinpoint
what are the 2 divisions of the autonomic nervous system
sympathetic and parasympathetic; often supply the same structures but typically have contrasting effects
sympathetic
thoracolumbar, “fight or flight”, (hyped or scared) T1-L2
parasympathetic
craniosacral, “rest and digest”, head and sacrum
sympathetic effects
dislates pupils, decreases production of saliva, increases rate and strength of contractions, slows urinary production
parasympathetic
contradicts pupils, promotes salvation, decreases rate and strength of contraction, bladder contraction for urination
sympathetic trunk
on either side of the vertebral column, nerve like structures
ganglion
mass of cell bodies of sympathetic neurons; there is one lined up with each vertebrae
path of sympathetic signal
brain>ventral side of spinal cord>white ramus communicans>, sympathetic trunk (ganglion)> gray ramus communicans> spinal cord>desired location
sympathetic fibers supply the
trunk, neck, pelvis
the sympathetic trunk is used as an
elevator if they need to get to a different ganglion/ cord level, synapse at ganglion they need to leave
