spine / abdominals Flashcards
what 3 muscles make up erector spinae
- longissimus
- spinalis
- iliocostalis
longissimus
o = posterior sacrum
i = transverse processes, mastoid processes
a = extend spine
n = posterior rami
spinalis
o = lumbar spinous processes
i = spinous processes of upper back + neck
a = extend spine
n = posterior rami
iliocostalis
o = posterior iliac crest
i = lower ribs
a = extend spine
n = posterior rami
describe characteristics of cervical spine
- 7 vertebrae
- small vertebral body
- small spinous processes
- little transverse processes
describe characteristics of thoracic spine
- 12 vertebrae
- larger, heart shaped body
- articulate w/ ribs
- spinous process faces down
describe characteristics of lumbar spine
- 5 vertebrae
- bean shaped body
- long transverse processes
- spinous process faces back
describe characteristics of sacral spine
- 5 vertebrae
- fused
how many vertebrae are there in the coccygeal spine
4
list the 4 abdominal muscles
- rectus abdominus
- transverse abdominus
- internal obliques
- external obliques
rectus abdominus
o = pubis
i = costal cartilage ribs 5-7, xiphoid
a = trunk flexion
n = thoracic spinal nerves T7-T12
transversus abdominus
o = iliac crest, inguinal ligament, lumbar fascia, inferior 6 ribs
i = xiphoid, rectus sheath, pubis
a = compress abdomen
n = thoracic spinal nerves T8-T12
internal oblique
o = inguinal ligament, iliac crest
i = ribs 8-12, rectus sheath
a = compress abdomen, flex trunk bilaterally, rotate trunk unilaterally
external oblique
o = lower 8 ribs
i = rectus sheath, iliac crest
a = compresses abdomen, flex trunk bilaterally, rotates trunk unilaterally
n = lower intercostal nerves
what 3 muscles attach to the iliac crest
transversus abdominus, internal oblique (o)
external oblique (i)
