SpinalCord/Vertabrae/BackMuscles Flashcards
name highlited strs
explain where sensory and motor nerves differ in neuron channel location
mixed nerves run through to each of the rami, they continue to be mixed even once meeting together from the ant/post rami in the spinal nerve, but then seperate with motor neurons/impulse in the ventral root and sensory nerves in the dorsal root.
mnem: vroom vroom = ventral = motor
descr extrinsinc back muscles, name 6 rel.
what is innervation?
extrinsinc = physically loc. in back, but but mostly move the upper limbs
Superficial = trapezius, latissimus dorsi, levator scapulae, rhomboids
Intermed = serratus post. inferior, serratus post. superior
exterinisic innervation = nerves from anterior (ventral) rami.
descr/name 8 rel. intrinsic back muscles
name intrinsic back muscle innervation
on the back and move the back
superficial = spenius cervicis, splenius capitis
interm = erector spinae (iliocostalis, longissimus, spinalis)
deep = traversospinalis (semispinalis, multifidus, rotatores)
innervation = posterior (dorsal) rami
name trapezius action/orgin/insertion/blood/innerv
action: elevate/depress scapula. retract scapula.
origin = occipital proturb/ligamtenum nuchae/spinous proc T1-T12
Insert = lateral 3rd calvicle/acromion/scapular spine
Blood = transverse cervial a./v.
nerve: motor = accesory nerve
sensory = c3,c4 spinal nerves
name levator scapulae action/orgin/insertion/blood/innerv
action: elevate scapula/downward rot. of scapula
origin: post. tubercles of transverse process c1-c4
insert: medial border scapula
nerve: ant. (ventral) rami of c3-c4 and dorsal scapular nerve
blood: dorsal scapular artery/transverse cervical a.
rhomboid major action/orgin/insertion/blood/innerv
action = fix scapula to thoraci wall
origin = sp. proc. of t2-t5
insert = medial border scapula
nerve = dorsal scapular nerve
blood = dorsal scapular artery
rhombus minor action/orgin/insertion/blood/innerv
action = fix scapula to thoracic wall
origin = ligementum nuchae/spine c7/T1 vert.
insert = medial border scapula
nerve: dorsal scapular nerve
blood = dorsal scapualar artey
latissimus dorsi action/orgin/insertion/blood/innerv
action = extend/adduct/medial rot of humerus (arm)
origin = spin. proc. of T7-L5
insert = humerus
nerve: thoracordorsal nerve
bllod = thoracodorsal art.
transverse cervical
Triangle of auscitiation. What muscles b/w and what is relevance
inferior to trapezius, superior to latissimus and medial of the spine of the scapula.
good area to listen to heart/lung sounds b/w 6th/7th rib
lumbar triangle, what b/w and clincial rel.
b/w the lat/external oblique/iliac crest
site of lumbar hernias (rare)
serratus post. superior action/orgin/insertion/blood/innerv
interm. ext.
action = elevates ribs/proprioception of breathing
origin = ligementum nuchae/spin.proc. of C7-T3
insert = sup. aspect of ribs 2-4
nerve = ventral (ant.) rami of upper thoracic nerves
blood: post. intercostal a.
thoracolumbar fascia is critical to ?
organization of the back/muscles
serratus posterior inferior action/orgin/insertion/blood/innerv
intermed. extrisnic
action = depress ribs/proprio
origin = sp. proc. of T11-L2
insert = inferior aspect of ribs 9-12
nerve = ventral (anteriror) rami of lower thoracic nerves
blood = post. intercostal a.
splenius cervicis action/orgin/insertion/blood/innerv
superfiicial intrisinnc
action = extend neck/rotate head to side of lateral flexo;’;
origin = sp. proc. T3-T6
isnert = trans process of C1-C3
nerve = dorsal (post) rami of lower cervical nerves
bllod= descending occiptial artey
splenius capitis action/orgin/insertion/blood/innerv
superfic. intrinsic
action = extend head/rotate head one side of flex
origin = nuchal ligament/ sp. proc. of C7-T3
insert = mastoid process of temporal bone, lat. 3rd of sup. nuchal line
nerve = dorsal (post) rami of middle cervical nerves
blood = descending occipital a.
erector spinae action/orgin/insertion/blood/innerv
intermed. intrinsic (3 muscles)
acrion = extends/lateral bend of cerebral cloumn/head
origin (all 3): post. sacrum
insert = iliocostalilis (angles of lower ribs/cerv. tranverse processes)
Longissimus (b/w tubercels/angles of ribs and trasverse proc. of thoracic/cervical vert.)
Spinalis(spin. proc. of upper thoracic and mid cervial.
blood (supplied by region): cervical = occipital a.
thoracic = dorsal (post) brach of post. intercostal
sacral = dorsal branches of lateral sacral a.
Semispinalis (tranversospinalis) action/orgin/insertion/blood/innerv
deep intrin
action =extends head/upper vert. rot them also contralaterally (opp. side)
origin = transverse process C4-T12
insert = spinal proc. of cervical/thoracic regions
nerve = dorsal (post.) rami of spinal nerves
blood = (cervical = occipital, thoracic = dorsal brnach post. intercostal a.)
multifidus action/orgin/insertion/blood/innerv
deep intrin
action = stabilize vert/ vert contalateral
origin =sacrum/ilium/trans proc of t1-t12
insert = upper cervical trans. proc.
berve = dorsal (post.) rami of spinal nervs
blood = (cervical = occipital a.) (thoracic = dorsal branch post. intercostal) (sacral = drosal branch of lateral sacral a.)
rotatores action/orgin/insertion/blood/innerv
deep intrin
action = stabilize vert/ vert contalateral
origin =sacrum/ilium/trans proc of t1-t12
insert = upper cervical trans. proc.
berve = dorsal (post.) rami of spinal nervs
blood = (cervical = occipital a.) (thoracic = dorsal branch post. intercostal) (sacral = drosal branch of lateral sacral a.)
ID str in thoracic level xs
name 4 subocciptial muscles
describe overall function
which one has a special feature in terms of attachment?
rectus capitus posterior major
rectus capitus posterior minor
Obliquus capitis inferior** speical = no attachment to the skull
Obliquus capitis superior
all 4 work to posture/hold our neck
Obliquus capitis superiror
action/origin/insert/nerve/blood
suboccipital
origin = transverse process of atlas (C1)
insert = occiptial bone
nerve = subocciptial nerve (post. rami C1 *same thing*)
blood = vertabral a.
Obliquus capitis inferior
origin/insert/nerve/bllood
suboccipital
origin = spine of axis (C2)
inssert = transverse proc. of atlas (C1)
nerve = suboccitial nerve
blood = vertabral a.
rectus capitus posterior minor
origin/insert/nerve/bllood
subocc
origin = tubercle of post. arch of atlas (C1)
insert = median inferior nuchal line
nerve = suboccipital nerve
blood = vertebral artey
rectus capitus posterior major
origin/insert/nerve/bllood
subocc
origin = spine of axis (C2)
insert = inferior nuchal line
nerve =suboccipital nerve
blood = vertebral a.
suboccipital triangle
name boundaries/floor/roof
whats inside?
boundary = rectus capitius post. major/obliquus capitis sup. and inferior
floor = post. atlento-occitpital membrane and post arhc of c1
roof = semispinalis capitis
contents = vertebral a. (after 1st 90 degree turn) and suboccipitall nerve
Name the two main nerves of the Posteriror cervical region. what does each innervate?
- posterior ramus of spinal nerve C2; skin over neck and occipital bone
- Ant. rami of spinal nerves C2-C3; Supplies skin of superoposterior neck and scalp posterior to external ear
