exam 1: nervous systems Flashcards
part of the peripheral NS
contains vagus nerve (in the parasympathetic nervous system)
cranial nerves
what does ganglion mean?
bunch of neurons
which nervous system is encased in bone for protection?
central nervous system
what is the dorsal root ganglion?
it is just a bulge around the dorsal root
what are the two parts of the autonomic nervous system?
sympathetic and parasympathetic nervous system
what is gray matter
cell bodies
what does the central nervous system contain?
the brain and spinal cord
explain how the knee-jerk reflex happens
sensory input only goes through one segment of the spinal cord and out quickly
which part of the autonomic nervous system pertains to the cranial nerves and sacral regions?
parasympathetic nervous system
nerve that innervates a majority of the parasympathetic NS to send information (calming us down essentially, decreasing heart rate, etc)
vagus nerve
nervous system that contain voluntary motor neurons and sensory neurons (except vision)
peripheral nervous system
part of the peripheral NS
31 pairs, half that go to the left side and half that go to the right side of the body
form outside the bone
spinal nerves
part of the spinal cord that pertains to motor output (tells your arms, hands, feet, etc. what to do)
also often called the motor nerve
ventral root
part of the autonomic NS
allows cognition, thought, and emotional regulation
parasympathetic nervous system
what is white matter
axons from neurons (because its covered in myelin sheaths)
which part of the autonomic system system pertains to the thoracic and lumbar region?
sympathetic nervous system
part of the autonomic NS
responds to every stressor, perceived or not
fight or flight activated when we are upset or stressed about something
sympathetic nervous system
explain the cauda equina part of the spinal cord
the spinal cord ends around the lower lumbar region and as we grow, what continues is the cauda equina which are a bunch of nerves and/or axons that come off the spinal cord (especially to lower body regions)
part of the spinal cord that deals with sensory input (meaning info comes in, spinal cord does processing, sends up to brain, then back through _______)
dorsal root
t or f: you can’t have the sympathetic nervous system active while you are breathing slowly, it’s like a toggle
true
t or f: there is a connection between slowing your breathing and calming (activating the calming feeling of) the vagus nerve
true
what does innervate mean?
to stimulate
