7 + 9 Flashcards
Symp, pregang NT:
Ach
Symp, postgang NT:
NE
Ach (at sweat glands, erector pili)
Parasymp, pre/postgang NT:
Ach
Location of primary ANS neurons:
hypothalamus
Location of secondary symp neurons:
intermediolateral gray matter of T1-L3
Location of secondary parasymp neurons:
cranial nerve nuclei and sacral neurons
Eye:
Parasymp?
Symp?
constriction/contraction for near vision
dilation/relaxation for far vision
Glands:
Parasymp?
Symp?
tears, watery salivary secretion
thick salivary secretions, sweating
Heart:
Parasymp?
Symp?
decr force, rate; dilation of arteries
increase force and rate, constr at alpha + dilation at beta
Arterioles:
Parasymp?
Symp?
dilate
alpha=constrict
beta=dilate
Lung:
Parasymp?
Symp?
constr
dilates
GI:
Parasymp?
Symp?
stim peristalsis, relax sphincter, incr secretions
inh peristalsis, constr sphincter, decr secretions
Pancreas:
Parasymp?
Symp?
incr insulin/glucagon secretion
decr insulin + incr glucagon secretion
Liver:
Symp?
stim glycogenolysis
Adrenal:
Symp?
stim epi/NE release
Ureter/Bladder:
Parasymp?
Symp?
contr wall, relax sphnicter
relax wall, contr sphincter
Erectile tissues:
Parasymp?
Symp?
relax = erection
ejaculation
A lesion of ______ will cause Horner’s syndrome (ipsa-/contra-)lateral to lesion.
anywhere from hypothalamus to ciliary nerve
ipsa-
Motor afferents to skeletal muscle
A-alpha
Sensory afferents from skin
A-beta
Pregang autonomic afferents
B
Motor afferents to intrafusal fibers
A-gamma
Sensory afferents from muscle spindles
A-alpha
Sensory afferents from golgi tendon organs and Ruffini endings
A-beta
Sensory afferents from free nerve endings for pain, temp
A-delta (+ hair follicles
C (+ smell)
Postgang autonomic afferents
C
Somatosensory R for ct pressure and stretch
Ruffini
Somatosensory R for light touch and vibration
Meissner’s corpuscle
Somatosensory R for gross pressure and vibration
Pacinian corpuscle
Somatosensory R for temp and nociception
free nerve endings
Somatosensory R in subcut, joints, musc and mesentary
Pacinian corpuscle
Somatosensory R in glaborous skin
Meissner’s corpuscle
deep layers = Ruffini organs
Somatosensory R on fingertips
Merkel’s disks
Rapidly adapting mechanoR
Pacinian corpuscle
Meissner’s corpuscle
Slowly adapting mechanoR
Ruffini organs
Merkel’s disks
Free nerve endings encapsulated in lamallae
Pacinian corpuscles
lamellae move relative to one another, corpuscle distorts
Signals on/off of a stimulus
Pacinian corpuscle
Within the spinal cord, protopathic info travels in the:
anterolateral funiculi in the spinothalamic tract
Within the spinal cord, epicritic info travels in the:
post columns, which become the medial lemniscus tract
Lemnicus pathway cervical axons add…
laterally
Protopathic cervical axons add…
medially
Cuneatus is (medial/lateral) to gracilis
lateral
intralaminar thalamic nuclei project…
diffusely throughout cortex
dorsomedial nuclei project…
to prefrontal cortex
A-delta fibers mediate:
And synapse in lamina #:
1st pain
1, 2 (sub gelatinosa)
Interneurons in 1/2 also project to lamina #:
5
C fibers mediate:
And synapse in lamina #:
2nd pain
1
Lissauer’s tract carries:
And interconnects:
non-discriminative pain and temp
neighboring segments of post horn
Trigeminal projects to:
VPM
Somatosensory afferents for head/face have cell body in:
Gasserian/Trigeminal ganglion
S1 is located in…
S2 is located in…
areas 3, 1, 2
parietal operculum
Area 3a receives:
muscle afferents and nociceptive info from thalamus
Area 3b receives:
cutaneous input
Area 1 receives:
input from 3b
Area 2 receives:
input from 3a and 3b and integrates it!
