Deep Back Flashcards
Movements of the axial skeleton
Lateral flexion, flexion, extension, rotation
What two joints in the spine permit movement in the spine?
Amphiarthrosis between each vertebrae from the discs
Diarthrosis joints from the articular facets
Superficial group of the intrinsic muscles
Splenius capitis and splenius cervicis
Origin of splenius capitis and splenius cervicis
Spinous processes of C7-T6
Insertion of splenius capitis
Mastoid process
Insertion of splenius cervicis
Transverse processes C1-C3
Bilateral action of splenius capitis and splenius cervices
Extend head and neck
Unilateral action of splenius capitis and splenius cervicis
Laterally flex the neck, rotate head to the side (ipsilateral rotation)
Intermediate group of the intrinsic muscles
Erector spinae group
Spinalis, longissimus, iliocostalis
Origin for erector spinae group
Iliac crest, sacrum, lumbar spinous processes, supraspinous ligament
Insertion of spinalis
Spinous processes, occipital bone
Insertion of iliocostalis
Rib angles, cervical processes
Insertion of longissimus
Transverse processes, ribs, mastoid processes
Divisions of spinalis muscle
Capitis, cervicis, thoracis
Divisions of longissimus muscle
Capitis, Cervices, thoracis
Divisions of iliocostalis
Cervices, thoracis, lumborum
Bilateral action of erector spinae muscle group
Extend the back, head, and neck
Unilateral action of erector spinae group
Lateral flexion of vertebral column to the same side
Origin of semispianlis muscle group
Tranverse processes of thoracic and lower cervical vertebrae
Insertion of semispinalis capitis
Occipital bone
Insertion of semispinalis cervices
Cervical spinous processes. Ends at C2
Action of semispinalis
Rotates head/neck contralaterally
Bilateral action of transversospinalis
Extend and stabilize the vertebral column
Origin of rototores
Transverse process
Insertion of rototores
Spinous processes and lamina
Action of rototores
Assist in stabilization and rotation of
Origin of multifundus
Sacrum, ilium (PSIS), mammillary processes of lumbar vertebrae
Insertion of multifundus
Spinous processes of thoracic and lumbar vertebrae
Action of Interspinales
Assist in extension
Action of intertransversarii
Assist in lateral flexion and stabilization of
Action of levatores costarum
Elevate ribs and assist in respiration. Assist in lateral flexion.
Development of deep back muscles from myotomes
Myotomes divide into dorsal and ventral mass.
Dorsal mass becomes intrinsic back muscles
Ventral mass becomes hypaxial muscles
Origin of rectus capitis posterior major
Spinous process of C2
Insertion of rectus capitis posterior major
Inferior nuchal line of occipital bone
Action of rectus capitis posterior major
Extension and ipsilateral rotation
Origin of rectus capitis posterior minor
Posterior tubercle of C1
Insertion of rectus capitis posterior minor
Inferior nuchal line of occipital bone
Action of rectus capitis posterior minor
Extension and ipsilateral rotation
Origin of obliquus capitis inferior
Spinous process of C2
Insertion of obliquus capitis inferior
Transverse process of C1
Action of obliquus capitis inferior
Ipsilateral rotation of head
Origin of obliquus capitis superior
Transverse process of C1
Insertion of obliquus capitis superior
Occipital bone
Action of obliquus capitis superior
Extension and lateral flexion of head
Greater occipital nerve innervates ___
Skin over posterior neck and head
Primarily cutaneous
Suboccipital nerve innervates ______
Muscles of suboccipital region
Primarily somatic motor
Lesser occipital nerve innervates ______
Scalp posterior to the ear and skin postero-lateral neck
Primarily cutaneous
Contents of the suboccipital triangle
Vertebral artery and suboccipital nerve
Superiomedial border of the suboccipital triangle
Rectus capitis posterior major
Superolateral border of the suboccipital triangle
Obliquus capitis superior
Inferolateral border of the suboccipital triangle
Obliquus capitis inferior
Floor of the suboccipital triangle
Atlanto-occipital membrane and posterior arch of C1
Roof of suboccipital triangle
Semispinalis capitis