Spine/ neck muscles Flashcards Preview

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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

Transversospinalis
Parts
Innervation
Action

Semispinalis, Multifidus,
Rotatores (brevis and longus)

Posterior rami of spinal nerves