Axial Muscle Chart Flashcards
External oblique
O: Posterolateral ribs 5-12
I: Iliac crest, linea alba
A: Flex, I/L lat flex, C/L rotation
S: Intercostal N C7-12
Internal oblique
O: Iliac crest, thoracolumbar fascia
I: Linea alba, inf ribs
A: Flex, I/L lat flex, I/L rotation
S: Intercostal N T7-12
Transverse abdominis
O: Ribs 7-12, thoracolumbar fascia, iliac crest
I: Linea alba
A: Support abdominal wall, compress abdomen
S: Intercostal N T7-12
Serratus posterior: superior
O: lower cervical + upper thoracic SP
I: upper ribs
A: Elevate ribs
S: Intercostal N 1-3
Serratus posterior inferior
O: Lower thoracic + upper lumbar SP
I: lower ribs
A: depress ribs
S: Intercostal N 9-12
Splenius capitis
O: cervical + upper thoracic SP
I: mastoid process, superior nuchal line
A: Extend, I/L lat flex, I/L rotation
S: dorsal rami of inf cervical N
Splenius cervicis
O: upper thoracic SP
I: upper cervical TP
A: extend, I/L lat flex, I/L rotation
S: dorsal rami of inf cervical N
Iliocostalis: lumborum, thoracic, cervicis
Lumborum: iliac crest to angles of lower ribs
Thoracic: angles of lower ribs to angles of upper ribs
Cervicis: angles of upper ribs to lower cervical TP
A: extend, I/L lat flex, I/L rotation
S: dorsal rami
Longissimus thoracis, cervicis, capitis
Thoracis: lumbar TP - thoracic TP and lower 9 ribs
Cervicis: upper thoracic TP - cervical TP
Capitis: upper thoracic and lower cervical TP - mastoid process
A: ext, I/L lat flex, I/L rotation
S: dorsal rami
Spinalis thoracis, cervicis
Thoracis: upper lumbar and lower thoracic SP - upper thoracic SP
Cervicis: lower ligamentum nuchae - axis SP
A: ext, I/L lat flex, I/L rotation
S: dorsal rami
Semispinalis: thoracic, cervicis, capitis
Thoracis: lower thoracic TP - upper thoracic + lower cervical SP
Cervicis: upper thoracic TP - cervical SP
Capitis: upper thoracic and lower cervical TP - occipital bone
A: Ext, I/L lat flex, C/L rotation
S: dorsal rami
Multifidus
O: sacrum, lower lumbar to lower cervical TP
I: SP vertebrae 2-5 superior
A: Ext, I/L lat flex, C/L rotation
S: dorsal rami
Rectus abdominis
O: Ribs 5-7, xiphoid process
I: pubic ramus
A: Flex
S: Intercostal N T7-T12
Rotatores
O: lumbar to cervical TP
I: Brevis: lumbar to cervical SP of adjacent superior vertebrae
Longus: lumbar to cervical SP of vertebrae 2 levels superior
A: Ext, I/L lat flex, C/L rotation
S: dorsal rami
Interspinalis
O: lumbar to cervical SP
I: lumbar to cervical SP of adjacent superior vertebrae
A: Extend
S: dorsal rami
Intertransversarii
O: lumbar to cervical TP
I: lumbar to cervical TP of adjacent superior vertebrae
A: I/L lat flex
S: dorsal rami
Quadratus lumborum
O: upper lumbar TP, 12th rib
I: iliac crest
A: Ext, I/L lat flex
S: T12-upper lumbar ventral rami
Rectus capitis posterior major
O: Axis SP
I: Inf nuchal line
A: ext, I/L rotate
S: Suboccipital N
Rectus capitis posterior minor
O: Post arch atlas
I: Inf nuchal line
A: Ext, I/L rotate
S: Suboccipital N
Obliquus capitis superior
O: Atlas TP
I: Occipital bone
A: Ext, I/L lat flex
S: suboccipital N
Obliquus capitis inferior
O: Axis SP
I: Atlas TP
A: I/L rotate
S: Suboccipital N
Sternocleidomastoid
O: Manubrium, med clavicle
I: Mastoid process, sup nuchal line
A: Ext occiput/upper cervical, Flex lower cervical, I/L lat flex, C/L rotate
S: Cranial nerve XI (accessory), Ventral rami C1-C2
Platysma
O: Sup fascia of deltoid/pectoral region
I: Inf border mandible
A: Flex, tighten neck skin
S: Facial N
Scalenus posterior
O: C5-C6 TP
I: Rib 2
A: I/L lat flex, C/L rotate
S: C3-C8 ventral rami
Scalenus medius
O: C2-C7 TP
I: Rib 1
A: I/L lat flex, C/L rotate
S: C3-C8 ventral rami
Scalenus anterior
O: C3-C6 TP
I: Rib 1
A: Flex, I/L lat flex, C/L rotate
S: C3-C8 ventral rami
Sternohyoid
O: hyoid bone
I: manubrium
A: depress hyoid
S: C1-C3 ventral rami
