Epaxial mm Flashcards
superficial layer
splenius
serratus dorsalis cranialis
serratus dorsalis caudalis
spleinus
cr: nuchal crest of occipital and mastoid of temporal
cd: first thoracic spinal processes
a: extend head and neck, lateral movement of head and neck
serratus dorsalis cranialis
dorsal attachment: median raphe of neck, first thoracic spinous process
ventral attachment: lateral surface of ribs 1-10
a: agonist during inspiration
serratus dorsalis caudalis
dorsal attachment: thoraco-lumbar fascia
ventral attachment: dorso-lateral areas of ribs 11-13
a: agonist during expiration
deep layer
iliocostalis
longissimus
transversospinalis system
iliocostalis
cr: C7 and T1
cd: Ilium
a: extend, fix, and lateral movements of thoracic and lumbar regions
has thoracic and lumbar portion (lumbar stronger)
longissimus
cr: mastoid process
cd: Ilium
a: extend and lateral movements of head, cervical, thoracic and lumbar regions. stabilize and fix vertebral column
4 portions (capitis, cervicis, thoracis, and lumborum)
transversospinalis system
semispinalis capitis
spinal and semispinalis thoracis and cervicis
multifundus
obliquus capitis
rectus capitis dorsalis
semispinalis capitis
cr: nuchal crest of occipital bone
cd: last cervical and first thoracic vertebrae
a: extend head and neck, lateral movement of head and neck
spinal & semispinalis
a: extend and lateral movements of neck and thorax
multifidus
a: fix vertebral column
short muscles that act as chain
has cervical, thoracic and lumbar regions
obliquus capitis cranialis
cr: nuchal crest of occipital bone and mastoid process of temporal
cd: wing of atlas
a: extend atlantooccipital bone
obliquus capitis caudalis
cr: wing of atlas
cd: axis
a: fix and rotate atlanto-axial joint
rectus capitis dorsalis
cr: squama of occipital bone
cd: axis
a: extend atlantooccipital joint
expaxial muscles are
on the dorsal aspect of the vertebrae
