lab final 231 Flashcards
reflex arc
neural pathway of a reflex
autonomic (visceral) reflexes
regulate body function. BP, sweating, etc
somatic reflexes
involve skeletal muscles. maintain posture, balance, and locomotion
receptor
site of stimulus. goes to dorsal horn
sensory neuron
transmits afferent impulse to CNS
integration center
where sensory input is received and transferred to motor neurons (interneuron)
motor neuron
conducts efferent impulses to effector
effector
muscle fiber or gland that responds to efferent impulse
stretch reflex (achiles/patellar)
somatic
plantar reflex
somatic
gag reflex
somatic. ipsilateral
ciliospinal reflex
autonomic. ipsilateral pupil dilation in response to pain stimulus
salivary reflex
autonomic
parasympathetic division
feed and breed
sympathetic division
fight or flight
conus medullaris
L1/2. tapered end of the spinal cord
filum terminale
e
level of origin
ee
level of terminimation
e
length of cord
L1/2 except of peds
gray commissure
connecting of ventral and dorsal gray matter
denticulate ligaments
e
gray mater
(light on slide)
white mater
(dark on slide)
dura mater
most superficial
arachnoid layer
middle layer
pia mater
deepest layer
epidural space
between dura mater and bone
subarachnoid space
contains SF
cervical enlargement
change in width
lumbar enlargement
change in width
caudia equina
e
spinal tap
l4/5
central canal
CSF in the middle
lateral horn
thoracic vertebrae (sympathetic NS)
dorsal root
sensation coming in
ventral root
motor information going out
dorsal root ganglion
cell bodies of sensory neurons
dorsal horn
numbness/sensation
ventral horn
motor
funiculus
columns of mater (post, lat, ant)
spinal nerve
where dorsal and ventral meet and merge
afferent
sensory
efferent
motor
ramus
where spinal nerve branches dorsal or ventral
brachial plexus
e
reflex
rapid and predictable motor response to stimulus
ipsilateral reflex
cord reflex that remains on one side of the body (biceps/achilles reflexes)
contralateral reflex
reflex that affects opposite side of body from stimulus
cranial reflex
when integration center is in the brain
spinal reflex
interconnections and processing take place in spinal cord
monosynaptic reflex
sensory neuron synapse direction on motor neuron. delay is minimized. synapse IS integration center
polysynaptic reflexes
there is at least one interneuron between sensory and motor. allows for more complex responses
consensual reflex
occurs on both side at the same time