Poochie Back Muscles

Front 1

How do most back muscles recieve their blood?

Back 1

the dorsal branches of the aorta, the primary artery of the body

Front 2

Spinal nerve

Back 2

anterior and posterior branches of the spinal cord come together and form the spinal nerve, they run throught the vertebral foramen

Front 3

The spinal nerve bifurcates into...

Back 3

larger ventral branch, smaller dorsal branch (ventral and dorsal rami)they carry sensory and motor nerve fibers. Dorsal rami do not innervate superficial muscles of the back.

Front 4

What innervates the upper half of the skin?

Back 4

medial dorsal rami

Front 5

What innervates the lower half of the skin?

Back 5

lateral branches of the dorsal rami

Front 6

superficial muscles

Back 6

muscles that connect the upper limgs to the trunk muscles innervated by nerves not from the dorsal primary rami (Latissmus dorsi, Levator scapulae, rhomboids, and serratus muscle innervated by ventral rami--excluding the trapezius)

Front 7

native (deep) back muscles

Back 7

innervated by dorsal primary rami, develop in the back and stay there during development

Front 8

Trapezius

Back 8

attaches at the external occipitial protuberance or inion and runs along to T12 (laterally attaches to the spine of the scapula, anteriorally attaches to the clavicle)Innervated by cranial nerve 11 "hook of monk"

Front 9

What do the upper fibers of the trapezius do?

Back 9

run obliquely from the superior to the inferior, they elevate and retract the scapula

Front 10

What do the inferior fibers of the trapezius do?

Back 10

run obliquely from the midpoint laterally to pull the scapula down

Front 11

horizontal fibers

Back 11

retracts the scapula bilaterally

Front 12

Where does the trapezius recieve blood from?

Back 12

half of us from the superficial branch of the transverse cervical artery, the other half directly from the transverse cervical artery

Front 13

Latissimus dorsi

Back 13

big muscle on the back. Attached in the mid thoracic region and then down the midline of the vertebrae below to the sacrus across from the iliac crest; fibers converge and end on the humerous

Front 14

what innervates the latissimus dorsi?

Back 14

the ventral rami--a branch of the brachial plexus called the thoracodorsal nerve

Front 15

where does the blood supply to the latissimus dorsi come from?

Back 15

a branch of the axillary artery, which is a continuation of the subclavian artery distal to the first rib

Front 16

Rhomboids

Back 16

once the trapezius is removed, the rhomboids appear (major and minor) It attaches at the medial border of the scapula and at the midline spine and upper thoracic and lower cervical regoion to the nunchal ligament and the spinous processes

Front 17

How do the rhomboids move the scapula?

Back 17

the same way as the trapezius

Front 18

What innervates the rhomboids?

Back 18

dorsal scapular nerve from the ventral rami and brachial plexus

Front 19

Serratus Posterior Muscles

Back 19

Thin and attach to the lower and upper four ribs; they are proprioceptive, not motor

Front 20

nunchal ligament

Back 20

starts at C7 and ends at the exterior occipital protuberance.

Front 21

What anchors to the superspinous ligament?

Back 21

Latissimus dorsi and the trabizus

Front 22

aponeurosis

Back 22

flattened tendon from the latissimus dorsi (lumbodorsal fascia)

Front 23

Triangle of auscultation

Back 23

listening to something, easy to listen here b/c of a deficit of muscle tissue. Bound by the latissimus dorsi, the trapezius, the medial edge of the scpula and the inferior edge of the rhomboid major

Front 24

Triangle of petit

Back 24

bound by the latissimus dorsi, the iliac crest, and external abdominal oblique

Front 25

deep muscles

Back 25

splenius capitus, semispinalis, erector spinae group (3), transversospinalis group

Front 26

splenius capitus

Back 26

fibers run medial from the cervical spine and down laterally from the upper thoracic spine--attach to the mastoid process and the superior nunchal line; help extend the neck, innervated by dorsal rami

Front 27

semispinalis

Back 27

deep in the splenius capitus, first of the transversospinalis group, arise from the transverse process and attach to the base of the bone at the occipital bone(superior nuchal line)

Front 28

erector spinae group (sarcospinalis group)

Back 28

run in longitudinal columns from medial to lateral, cover most of the posterior throax and lumbar region, innervated by dorsal rami

Front 29

what does the erector spinae group do?

Back 29

contracts to extend the spine and helps let the spine down easy

Front 30

what are the three groups of erector spinae?

Back 30

medial: spinaus
intermediate: longissimus
lateral: iliocoatalis

Front 31

transversospinalis group

Back 31

help hold spine together and have proprioceptive fibers; deep to erector spinae group

Front 32

Three types of transversopinalis muscles

Back 32

Roator muscles (will not skip more than one segment of the spinous processes)
Multifidus-skips three to five segements of spinous processes
Semispinalis-skips five to seven segments

Front 33

Feedback muscles

Back 33

Suboccipital muscles that anchor C1 and C2 together with occipital bone

Front 34

Splenius muscles (capitis and cervicis)

Back 34

thick and flat and lie on the lateral and posterior aspects of the neck, like a bandage, arrise from nuchal ligament and spinous processes(C7-T3 or T4)

Front 35

Insertion of slenius capitis

Back 35

fibers run superolaterally to the mastoid process of the temporal bone and the lateral third of the superior nuchal line of occipital bone.

Front 36

insertion of splenius cervicis

Back 36

in the transverse processes of C1-C3 or C4