Vertebral Column and Deep Back Muscles Flashcards
Splenius Capitis
Origin
- Nuchal ligament
- spinous processes of C7-T3 or T4 vertebrae
Splenius Capitis
Insertion
- Fibers run superolaterally to mastoid process (oftemporal bone)
- lateralthird of superior nuchal line (of occipital bone)
Splenius Capitis
Innervation
Dorsal rami of spinal nerves
Splenius Capitis
Actions
- ipsilat laterally flexes & rotates head & neck
- bilat extends head & neck
Splenius Cervicis
Origin
- Nuchal ligament
- spinous processes of C7-T6 vertebrae
Splenius Cervicis
Insertion
-Tubercles of transverse processes of C1-C3
vertebrae
Splenius Cervicis
Innervation
Dorsal rami of spinal nerves
Splenius Cervicis
Action
- ipsilat laterally flexes & rotates head & neck
- bilat extends head & neck
Ilicostalis
Origin
- Arises by a broad tendon from posterior part of iliac crest
- posterior surface of sacrum
- sacroiliac ligaments
- sacral and inferior lumbar spinous processes –supraspinousligament
Ilicostalis
Insertion
Lumborum, Thoracis, Cervicis: fibers run superiorly to angles of lower ribs and cervical
transverse processes
Ilicostalis
Innervation
Dorsal rami of spinal nerves
Ilicostalis
Action
- ipsilat laterally flexes trunk
- bilat extends trunk
Longissimus
Origin
- Arises by a broad tendon from posterior part of iliac crest
- posterior surface of sacrum
- sacroiliac ligaments
- sacral and inferior lumbar spinous processes
- supraspinous ligament
Longissimus
Insertion
- Thoracis: ribs between tubercles and angles, and thoracic transverse processes.
- Cervicis: transverse processes in cervical
region. - Capitis: mastoid process of temporal bone
Longissimus
Innervation
Dorsal rami of spinal nerves
Longissimus
Action
- ipsilat laterally flexes trunk
- bilat extends trunk
Spinalis
Origin
-Arises by a broad tendon from posterior part of iliac crest
-posterior surface of sacrum sacroiliac ligaments
-sacral and inferior lumbar spinous
processes
-supraspinous ligament
Spinalis
Insertion
Thoracis, Cervicis, Capitis: fibers run superiorly to spinous processes in upper
thoracic region and to cranium
Spinalis
Innervation
Dorsal rami of spinal nerves