Erector Spinae Group

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iliocostalis proximal attachments

- sacrum - iliac crest - spinous processes in lumbar region

Proximal attachments of the longissimus

- sacrum - iliac crest - spinous processes in lumbar region - transverse processes

What group of muscles contains the iliocostalis, longissimus, longissimus capitis, and the spinalis?

Erector Spinae group

Iliocostalis distal attachments

Ribs

bilateral action of spinalis

extend

bilateral actions of the longissimus

extend

iliocostalis bilateral actions

extend

primary actions of longissimus capitis

ipsilateral roation

iliocostalis unilateral actions

laterally flex

unilateral actions of the longissimus

laterally flex

distal attachments of longissmus capitis

mastoid process

iliocostalis innervation

posterior rami in region of muscle

innervation of longissimus capitis

posterior rami in region of muscle

innervation of spinalis

posterior rami in region of muscle

innervation of the longissumus

posterior rami in region of muscle

distal attachment of spinalis

spinous processes

proximal attachment of spinalis

spinous processes

proximal attachments of longissimus capitis

transverse processes in upper thoracic AND lower cervical

distal attachments of longissimus

transverse processes, ribs


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