SA-muscles Flashcards
Laterally flexes head/neck to same side and when contracts bilaterally, extends spine
erector spinae muscles (neck)
Illiocostalis, longissimus, spinalis
spinalis O&I
SP to SP
Illiocostalis O&I
O: Sacrum/Illiac Crest/Spinous Processes of lower lumbar/thoracic vertebrae
I: Ribs
cervicis O: angles of the third, fourth, fifth, and sixth ribs, I: Inserted into the posterior tubercles
longissimus O&I
TP to TP
4 muscles of sub occipital triangle
Inf. oblique
Sup. oblique
Rectus capitus post. major
rectus capitus post. minor
All 4 muscles of sub occipital triangle are innervated by
dorsal ramus C1 “suboccipital nerve”:somatic motor
Sub occipital triangle:transverse process of C1 to spinous process of C2; makes atlas (C1) pivot on axis (C2); same-side rotation
Inferior oblique
Sub occipital triangle:transverse process of C1 to skull
Superior oblique
Sub occipital triangle: spinous process of C2 to skull
rectus capitus posterior major
Name two muscles that have attachment at the transverse process of C1 (atlas)
superior oblique and inferior oblique
posterior tubercle of C1 to skull
rectus capitus posterior minor
Name two muscles that have attachment at the spinous process of C2 (axis)
inferior oblique, rectus capitus posterior major, and semispinalis cervicis
Name muscle that attaches at the posterior tubercle of C1 (atlas)
rectus capitus posterior minor
Name artery lying on top of the atlas (C1)
vertebral
Name source and termination of vertebral artery
source: subclavian artery
termination: basilar artery
somatic sensory fibers to the spinal cord via
dorsal roots
somatic motor fibers away from the spinal cord via
ventral roots
What separates the dorsal roots from the ventral roots
denticulate ligament
DRG comes from
neural crest cells
Pelvic diaphram is made up of muscles (2)
primary?
secondary?
levator ani (primary) coccygeus (2ndary)
infrahyoid muscles are innervated by the
ansa cervicalis (C-C4)
what are the 4 infra hyoid muscles?
sternohyoid
sternothyroid
thyrohyoid
omohyoid
“Silly Sam tried opium”
CN4 innervates
superior oblique
atrophy of fingers (interosseous muscles) and inflammation of pisiform can affect the ____
ulnar nerve
- Flexion of the hip is the primary action of the
psoas
What muscle attaches to the articular disc (between mandible and temporal)
lateral ptyerogoid muscle
nerves supplies the SCM muscles
spinal accessory – also the traps
Muscles derived form the 1st pharyngeal arch are supplied by the nerve
V - trigeminal
______ attaches to the coronoid process of the mandible
temporalis
serratus anterior is innervated by
long thoracic nerve
transversal spinal muscle group (deepest)
semispinalis capitis
multifidis
rotators
what muscle attaches to the articular processes of C3 through C6
semispinalis capitis
*this is a deep muscle
erecter spinae muscles
I love spine
Illiocostalis, Longissium, spinalis
levator palpebrae superioris → innervated by
CN III and sympathetics
continuation of the ligamentum nuchae
supraspinous ligament
muscle fibers of the diaphram insert
central tendon – pierced by the IVC
-origin is the costal margin and ribs
lower four ribs are depressed by which of the following muscles
serratus posterior inferior
- serratus anterior – protractor and abduction of the scapula
- internal and external intercostalis → pulls only one rib
- serratus posterior superior → elevates the upper four ribs
