Neuro Flashcards
What makes up the CNS
brain
spinal cord
CN I and II
what do sensory neurons inervate
skin muscle joints viscera provide sensory info to CNS
what are the nerves of the PNS separated into
sensory
motor
what do motor nerves innervate
skeletal muscle (somatic) and ANS
what are the two components of the autonomic nervous system
sympathetic
parasympathetic
T or F the SNS and PNS work together
false
they work in opposition to one another
how many cranial nerves are there? how many spinal nerves are there
12
13
are the cranial and spinal nerves part of the CNS or PNS?
predominantly PNS
exception: CN I and II are part of CNS
What is cranial nerve II? what is it’s function?
Optic (part of the CNS)
Function: vision, detection of light
How do we test CN II
read eye chart
detect objects/movement from corner of eyes
shine light into pupil
what is CN III? what is it’s fn?
oculomotor
Function: eye movement (up, down and in)
pupil dilation and constriction
raise eyelids
how do we test CN III
ask person to follow moving target
pupil response to light
check for ptsosis (drooping)
What is CN IX? what is its function?
Glossopharyngeal
Function: swallowing, gag reflex, speech
What is cranial nerve X? what is its fn?
vagus
swallowing, gag reflex and speech; control of muscle in internal organs
How do you test CN IX and X
ask person to swallow
say aah to check movement
have pt speak and cough - ability to protect airway
are reflexes part of the CNS or PNS
PNS
do reflexes involve the brain
no
what are the 5 components of a reflex arc
receptor - sensory fibers sensitive to stimulus
sensory neuron- afferent neuron relays impulse via posterior/dorsal root of spinal cord
interneuron - connecting center within CNS
Motor neuron - efferent neuron that relays impulse via anterior/ventral root of spinal cord to effector organ
effector- specific organ that responds
What is the brainstem composed of (5)
midbrain pons medulla reticular formation RAS
What is responsible for involuntary actions such as HR, RR, BP
brainstem
what is the area where the motor fibers cross? What kind of findings do we see below this area
brainstem
changes on contralateral side
What is the pons
relay center btw cerebellum and cerebrum
where does the brainstem connect to the spinal cord
through the foramen magnum to become the medulla
what makes up the cerebrum
cerebral hemispheres diencephalon thalamus hypothalamus basal ganglia