Axial Muscles (Muscles of the Vertebral, Thorax and Abdominal)

Superficial Groups

connects the vertebrae to the ribs

iliocostalis, longissimus, spinalis

what are the erector spinae muscles

Superior Six Ribs

Origin of Cervicis (Illio)

Transverse process of middle cervical vertebrae

Insertion of Cervicis (Illio)

Dorsal rami of thoracic nerves (I-C)

Nerve of Cervicis(Illio)

Extends, laterally flexes, and rotates the vertebral column (I-C)

Action of Cervicis (Illio)

Inferior six ribs

Origin of Thoracis (Illio)

Superior six ribs

Insertion of Thoracis (Illio)

Dorsal rami of thoracic nerve

Nerve of Thoracis (Illio)

Extend, laterally flexes, and rotates thoracic vertebrae

Action of thoracis (Illio)

sacrum, ilium, and lumbar region

Origin of Lumborum

Inferior six ribs

Insertion of Lumborum

Dorsal rami of thoracic nerve and lumbar nerve

Nerve of Lumborum

Extends, laterally flexes, rotates vertebral column

Action of Lumborum

Cervicis, Thoracis, and Lumborum

what are the muscles of Illiocostalis

Capitis, cervicis, thoracis

muscles of longissimus

Upper thoracic and lower cervical

Origin of Capitis

Mastoid Process

Insertion of Capitis

Dorsal rami of cervical nerve

Nerve of Capitis

Extends neck

Action of Capitis

Upper thoracic vertebrae

Origin of Cervicis (Longissimus)

Transverse process of upper cervical vertebrae

Insertion of Cervicis (Longissimus)

Dorsal rami of cervical vertebrae

Nerve of Cervicis (Longissimus)

extends the neck

Action of Cervicis (Longissimus)

lower thoracic vertebrae and ribs

Origin of Thoracis (Longissimus)

Transverse process of the upper lumbar vertebrae and ribs

Insertion of Thoracis (Longissimus)

Dorsal rami of lumbar and thoracic

Nerve of Thoracis (Longissimus)

Extends vertebral column

Action of Thoracis (Longissimus)

Cervicis and Thoracis

Muscles of spinalis

C6-C7

Origin of Cervicis (Spinalis)

Spinous process of C2-C3

Insertion of Cervicis (Spinalis)

Dorsal rami of cervical nerve

Nerve of Cervicis (spinalis)

Extends neck

Action of cervicis (spinalis)

T11-L2

Origin of Thoracis (Spinalis)

Spinous process of middle and upper thoracic vertebrae

insertion of thoracis (spinalis)

dorsal rami of thoracic vertebrae

nerve of thoracis (spinalis)

extends vertebral column

action of thoracis (spinalis)

cervicis and thoracis

Muscles of semispinalis

Transverse process of T2-T5

Origin of Cervicis (semispinalis)

Spinous process C5-T11

Insertion of Cervicis (semispinalis)

Dorsal rami of cervical vertebrae

Nerve of Cervicis (semispinalis)

Extends neck

Action of of Cervicis (semispinalis)

Transverse process of T5-T11

Origin of Thoracis (semispinalis)

Spinous process of C5-T4

Insertion of Thoracis (semispinalis)

Dorsal rami of thoracic nerves

Nerve of Thoracis (semispinalis)

extends vertebral column

Action of Thoracis (semispinalis)

Spinous process of C3-C5

Origin of Splenius Cervicis

Transverse process of C1-C3

Insertion of Splenius Cervicis

Dorsal rami of cervical nerve

Nerve of Splenius Cervicis

rotates and extends neck

Action of Splenius Cervicis

Deep group

connects vertebrae together

Deep group

deepest muscles attach between the spinous process and transverse process

Psoas Minor, Interspinalis, Multifidus, Intertranversarii, Rotatores

what are the muscles of deep group

spinous process of all vertebrae

Origin of Interspinalis

next superior spinous process

Insertion of Interspinalis

dorsal rami of spinal nerve

nerve of interspinalis

extends back and neck

action of interspinalis

Transverse process of all vertebrae

Origin of Intertransversarii

Next superior transverse process

Insertion of Intertransversarii

Dorsal rami of spinal nerve

Nerve of Intertransversarii

laterally flexes vertebral column

Action of Intertransversarii

Transverse processes of vertebrae; posterior surface of sacrum and ilium

Origin of Multifidus

Spinous process of superior vertebrae

Insertion of Multifidus

dorsal rami of spinal nerve

Nerve of Multifidus

extends and rotates vertebral column

Action of Multifidus

T12 - L1

Origin of Psoas Minor

Pectineal line of pubic crest

Insertion of Psoas Minor

L1

Nerve of Psoas Minor

flexes the vertebral column

Action of Psoas Minor

transverse process of all vertebrae

Origin of Rotatores

base of spinous process of superior vertebrae

Insertion of Rotatores

Dorsal rami of spinal nerve

Nerve of Rotatores

Extends and rotates vertebral column

Action of Rotatores

Muscles of thorax

muscles of respiration

thorax muscles

accommodates and assists in changing the diameter of the rib cage during respiration

Scalene

elevates the first two ribs during FORCEFUL INSPIRATION

External Intercostals

elevates the ribs during quiet, RESTING INSPIRATION

Tranversus Thoracis

depresses the ribs during FORCED EXPIRATION

Diaphragm

muscle for normal quiet breathing

False: Flattens

T o F: diaphragm expands during contraction

Sternum, lumbar vertebrae, interior of ribs

Origin of Diaphragm

central tendon of diaphragm

Insertion of Diaphragm

Phrenic

Nerve of Diaphragm

Inspiration depresses the floor of thorax

Action of Diaphragm

Inferior margin of each rib

Origin of External Intercostals

Superior border of next rib below

Insertion of External Intercostals

Intercostals

Nerve of External Intercostals

Quiet inspiration elevates ribs

Action of External Intercostals

Superior margin of each rib

Origin of Internal Intercostals

Inferior border of the next rib

Insertion of Internal Intercostals

Intercostals

Nerve of Internal Intercostals

Forced inspiration depresses ribs

Actions of Internal Intercostals

Transverse processes of C3-C6

Origin of Anterior Scalene Muscles

First rib

Insertion of Anterior Scalene Muscles

Cervical Plexus

Nerve of Anterior Scalene Muscles

Elevates first rib

Action of Anterior Scalene Muscles

Transverse processes of C2-C6

Origin of of Medial Scalene Muscles

First ribs

Insertion of Medial Scalene Muscles

Cervical plexus

Nerve of Medial Scalene Muscles

elevates first rib

action of Medial Scalene Muscles