Flashcards in Spine/ neck muscles Deck (5)
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1
Iliocostalis ("lateral column")
Distal attachment
Distal attachment:
lumborum, thoracis, cervicis;
fibers run superiorly to angles of ribs and cervical transverse processes
2
Longissimus ("intermediate column")
Distal attachment
Distal attachment:
thoracis, cervicis, capitis;
fibers run superiorly to ribs between tubercles and angles to transverse processes in thoracic and cervical regions, and to mastoid process of temporal bone
3
Spinalis ("medial column")
Distal attachment
Distal attachment:
thoracis, cervicis, capitis;
fibers run superiorly to spinous processes in the upper thoracic region and to cranium
4
Erector spinae
Parts
Origin
Innervation
Action
Origin:
By a broad tendon from posterior part of iliac crest, posterior surface of sacrum, sacro-iliac ligaments, sacral and inferior lumbar spinous processes, and supraspinous ligament
Innervation:
Posterior rami of spinal nerves
Action:
Acting bilaterally: extend vertebral column and head; as back is flexed, control movement via eccentric contraction
Acting unilaterally: laterally flex vertebral column
5
