Axial Muscle Chart Origin Insertion Flashcards
Rectus Abdominis
O: Ribs 5-7, xiphoid process
I: pubic ramus
- Intercostal nerves T7-T12
External Oblique
O: Posterolateral ribs 5-12
I: iliac crest, linea alba
- Intercostal nerves T7-T12
Internal Oblique
O: iliac crest, thoracolumbar fascia
I: linea alba, inferior ribs
- intercostal nerves T7-T12
Transverses Abdominis
O: ribs 7-12, thoracolumbar fascia, iliac crest
I: Linea alba
- intercostal nerves T7-T12
Serratus Posterior: Superior
O: lower cervical & upper thoracic spinous processes
I: Upper ribs
- intercostal nerves T1-T3
Serratus Posterior: Inferior
O: Lower thoracic & upper lumbar SP
I: Lower ribs
- intercostal nerves T9-T12
Splenius Capitis
O: Cervical & upper thoracic SP
I: Mastoid process & superior nuchal line
- dorsal rami of inferior cervical nerves
Splenius Cervicis
O: Upper thoracic SP
I: Upper cervical TP
N: dorsal rami of inferior cervical nerves
Iliocostalis lumborum, thoracis, cervicis
Lumborum: Iliac crest –> angles of lower ribs
Thoracis: Angles of lower ribs –> angles of upper ribs
Cervicis: Angles of upper ribs –> lower cervical TP
N: dorsal rami
Longissimus thoracis, cervicis, capitis (note: lumborum is not significant)
Thoracis: Lumbar TP –> Thoracic TP & lower 9 ribs
Cervicis: Upper thoracic TP –> Cervical TP
Capitis: Upper thoracic & lower cervical TP –> mastoid process
- dorsal rami
Spinalis thoracis, cervicis (note: capitis blends with semispinalis capitis)
Thoracis: Uppwer lumbar & lower thoracic SP –> upper thoracic SP
Cervicis: Lower ligamentum Nuchae –> Axis SP
- dorsal rami
Semispinalis, thoracis, cervicis, capitis
Thoracis: lower thoracic TP –> Upper thoracic & lower cervical SP
Cervicis: Upper thoracic TP –> Cervical SP
Capitis: Upper thoracic & lower cervical TP –> Occipital bone
N: Dorsal Rami
Multifidus
Sacrum, lower lumbar to lower cervical TP
- Extend, ipsilateral lateral flexion, contralateral rotation
Rotatores
O: Lumbar to cervical TP –>
Brevis: lumbar to cervical SP of adjacent superior vertebrae
Longus: lumbar to cervical SP of vertebrae two levels superior
N: Dorsal Rami
Interspinalis
O: lumbar to cervical SP
I: lumbar to cervical SP of adjacent superior vertebrae
Intertransversarii
O: Lumbar to cervical TP
I: Lumbar to cervical TP of adjacent superior vertebrae
N: Dorsal Rami
Quadratus Lumborum
O: Upper lumbar TP, 12th rib
I: iliac crest
N: T12-upper lumbar ventral rami
Rectus capitis posterior major
O: Axis SP
I: Inferior nuchal line
Rectus capitis posterior minor
O: Posterior arch of atlas
I: Inferior nuchal line
Obliquus capitis superior
O: atlas TP
I: occipital bone
obliquus capitis inferior
O: axis SP
I: Atlas TP
Sternocleidomastoid
O: manubrium & medial clavicle
I: mastoid process, superior nuchal line
Platysma
O: Superior fascia of deltoid & pectoral regions
I: inferior border of mandible
Scalenus posterior
O: C5 & C6 TP
I: 2nd rib
scalenus medius
O: C2-C7 TP
I: 1st rib
Scalenus anterior
O: C3-C6 TP
I: 1st rib
sternohyoid
O: hyoid bone
I: manubrium
Sternothyroid
O: thyroid cartilage
I: manubrium
Thryohyoid
O: hyoid bone
I: thyroid cartilage
Omohyoid
O: hyoid bone
I: superior border of scapula
frontalis
O: epicranial aponeurosis
I: skin of eyebrow & forehead
orbicularis oculi
O: medial orbit - frontal and maxillary bones
I: Skin around orbit
Orbicularis oris
O: fibers from several facial muscles
I: skin & mucous membrane of lips
Buccinator
O: posterior maxilla & mandible
I: fibers blend with orbicularis Oris
Zygomaticus
O: zygomatic bone
I: angle of mouth
temporalis
O: temporal fossa - temporal, frontal, parietal bones
I: coronoid process of mandible
Masseter
O: zygomatic arch
I: outer surface of angle & ramus of mandible
medial pterygoid
O: lateral pterygoid plate & maxilla
I: inner surface of angle & ramus of mandible
Lateral pterygoid
O: lateral pterygoid plate & greater wing of sphenoid
I: Neck of mandible & articular disk
