Abdominal Wall And Intrinsic Back OIIA Flashcards
External oblique
O: rib 5-12
I: Linea alba, pubic crest, ASIS and iliac crest
I: anterior rami T7-L1
A: rot trunk to opp side and compress abdominal contents
Internal oblique
O: thoracolumbar fascia, iliac crest, inguinal lig
I: ribs 9-12, pubic crest and linea alba
I: anterior rami T7-T12
A: rot to same side and compress abdominal content
Transversus abdomen
O: thoracolumbar fascia, iliac crest, inguinal lig, costal cartilages of lower ribs
I: linea alba, pubic crest, pectineal line
I: anterior rami T7-L1
A: compress abdominal contents
Rectus abdominis
O: pubic crest, tubercle and symphysis
I: costal cartilages of rib 5-7 and xiphoid
I: anterior rami T7-T12
A: flex vertebral column and compress abdominal wall
Pyramidalis
O: front of pubs and pubic symphysis
I: linea alba
I: anterior ramus of T12
A: tenses linea alba
Spinotransversales muscles
Splenius capitis and cervicis
Splenius capitis
O: nuchal lig and SP of C7-T3
I: mastoid process and superior nuchal lig
I: posterior rami of mid CN
A: together (extend neck), uni (rot head)
Splenius cervicis
O: SP T3-T6
I: TP C1-C3
I: posterior rami lower CN
A: together (ext neck), uni (rot head)
Transvesospinales muscles
Semispinalis, multifidus, rotatores
Semispinalis capitis
O: T1-T6 TP
I: inferior nuchal area
A: bi (extend vertebral column), uni (pull SP to TP, rot trunk)
Semispinalis thoracis
O: T6-T10 TP
I: SP upper 4 TV and lower CV
A: bi (extend vertebral column), uni (pull SP to TP, rot trunk)
Multifidus
O: sacrum, PSIS, mammillary process of LV, TP of TV, AP of lower CV
I: SP L5-C2
A: bi (extend vertebral column), uni (pull SP to TP, rot trunk)
Rotatores thoracis
O: mammillary processes of LV, TP of TV, and AP of CV
I: SP
A: bi (extend vertebral column), uni (pull SP to TP, rot trunk)
Erector spinae functions
Bi: straighten back
Uni: SB
