Axial Muscles - Spine Muscles Flashcards
Name Origin, Insertion, and Action
Sternocleidomastoid
O: Sternum and Clavicle
I: Mastoid Process
A: Extends and Rotates Head, Flexes Spine
Scalenus
O: Transverse Processes of C-Spine
I: 1st and 2nd Rib
A: Flexes and Rotates Neck
Spinalis (Cervicis & Thoracis)
Erector Spinae
O: Spinous and Transverse Processes, Posterior Ribs from Occiput to Sacrum and Ilium
I: Spinous and Transverse Processes, Posterior Ribs from Occiput to Sacrum and Ilium
Cervicis A: Extends and Rotates Head
Thoracis A: Extends Spine
Longissimus (Capitus, Cervicis, Thoracis, & Lumborum)
Erector Spinae
O: Spinous and Transverse Processes, Posterior Ribs from Occiput to Sacrum and Ilium
I: Spinous and Transverse Processes, Posterior Ribs from Occiput to Sacrum and Ilium
Capitus A: Rotates Head & Pulls Backward
Cervicis A: Extends and Laterally Flexes C-Spine
Thoracis A: Extension, Lateral Flexion of spine, Rib Rotation
Lumborum A: Extends & Rotates spine
Iliocostalis (Cervicis, Thoracis, Lumborum)
Erector Spinae
O: Spinous and Transverse Processes, Posterior Ribs from Occiput to Sacrum and Ilium
I: Spinous and Transverse Processes, Posterior Ribs from Occiput to Sacrum and Ilium
Cervicis A: Extends C-Spine
Thoracis A: Extension, Lateral Flexion of spine, Rib Rotation
Lumborum A: Extension, Lateral Flexion of spine, Rib Rotation
Splenius Capitis
O: Lower half of Nuchal Ligaments, Spinous Processes of C7 - T3
I: Lateral Occipital bone, Mastoid Process
A: Extends and Rotates Head
Splenius Cervicis
O: Spinous Processes of T3 - T6
I: Transverse Processes of C1 - C3
A: Extends and Rotates Head
Semispinalis Capitus
Transversospinalis
O: Transverse Processes
I: Spinous Processes of vertebra above
A: Rotates Head and Pulls Backward
Semispinalis Cervices
Transversospinalis
O: Transverse Processes
I: Spinous Processes of vertebra above
A: Extends and Rotates Spine
Semispinalis Thoracis
Transversospinalis
O: Transverse Processes
I: Spinous Processes of vertebra above
A: Extends and Rotates Spine
Rotatores Thoracis
Transversospinalis
O: Transverse Processes
I: Spinous Processes of vertebra above
A: Extends and Rotates Spine
Multifidus
Transversospinalis
O: Transverse Processes
I: Spinous Processes of vertebra above
A: Extends and Rotates Spine
Longus Capitus
Longus Colli Cervices
Rectus Capitus Anterior
Rectus Capitus Lateralis
(Prevertebral Muscles)
O: Bodies and Transverse Processes of C2 - T2
I: Occiput, Transverse Processes and Bodies of C1 - C6
Long. Cap. A: Flexes Head
Long. Col. Cerv. A: Flexes C-spine
Rec. Cap. Anterior A: Flexes Head
Rec. Cap. Lateralis A: Bends Head Laterally
Rectus Capitus Posterior Major
Rectus Capitus Posterior Minor
Obliquus Capitus Superior
Obliquus Capitus Inferior
(Suboccipital Muscles)
O: Transverse & Spinous Processes C1 - C2
I: Occiput and Transverse Processes of C1
A: Extension of head and neck w/ some lateral bending and rotation
Psoas Major
O: Anterior & Lateral surfaces of T12 - L5
I: Lesser trochanter of femur
A: Flexes thigh at hip joint and vertebral column