BIO 290 Hypaxial muscles
Terms
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- Hypaxial muscles that comprise the thorcacic body wall
- External intercostal mm, internal intercostal mm, transversus thoracis mm
- Hypaxial muscle of the pelvic body wall
- Levator ani m
- Hypaxial muscles of the lateral abdominal body wall
- External abdominal oblique mm, internal abdominal oblique mm, transversus abdominus mm
- Hypaxial muscles of the anterior body wall
- Rectus abdominis mm
- Hypaxial muscles of the posterior abdominal wall
- Quadradatus lumborum mm
- Fiber direction of external intercostal
- Inferomedial
- Fiber direction of internal intercostal mm
- superomedial
- Fiber direction of transversus thoracis
- Varied
- Fiber direction of levator ani
- It's bowl-shaped
- Fiber direction of rectus abdominus
- Up (superiorly?)
- Fiber direction of external oblique
- inferomedial
- Fiber direction of internal oblique
- superomedial
- Fiber direction of transversus abdominus
- Varied
- Fiber direction of quadratus lumborum
- Straight up
- Origin and insertion of external intercostal mm and internal intercostal mm
- 11 pairs of muscles attached to ribs, occupying intercostal spaces
- Origin and insertion of transversus thoracis
-
origin: posterior surface of sacrum
insertion: internal surface of costal cartilages 2-6 - Origin and insertion of levator ani mm
- Origin: medial surface of pelvis from pubis to ischial spine
- Insertion of levator ani mm
- Coccyx, levator ani m of opposide side, structures that penetrate it
- Origin and insertion of rectus abdominus
- Origin: pubic bone
- Origin and insertion of external oblique
-
Origin: Lower 8 ribs
Insertion: linea alba via rectus sheath and iliac crest - Origin and insertion of internal oblique
-
Origin: thoracolumbar fascia, iliac crest, inguinal ligament
Insertion: linea alba via rectus sheath and iliac crest - Origin and insertion of transversus abdominus
-
Origin: lower 8 ribs, thoracolumbar fascia, iliac crest, inguinal ligament
Insertion: linea alba via rectus sheath - Origin and insertion of quadratus lumborum
- Origin: iliac crest
- External intercostal mm action
- elevation of rib cage during quiet inspiration
- Internal intercostal mm action
- depression of ribcage during forced expiration
- Tranversus thoracis action
- helps to depress ribs
- Levator ani action
- supports pelvic viscera, raises pelvic floor
- Rectus abdominus action
- compress and support abdominal viscera, flex trunk
- External oblique action
- compress and support abdominal viscera, flex and rotate trunk
- Internal oblique action
- compress and support abdominal viscera, flex and rotate trunk
- transversus abdominus action
- compress and support abdominal viscera
- quadratus lumborum action
- bilateral extension and lateral flexion of vertebral column
- Innervation of external intercostal, internal intercostal, and transversus thoracic mm
- Intercostal nerves
- Innervation of levator ani
- sacral ventral rami
- Innervation of rectus abdominus
- thoracic ventral rami
- Innervation of external oblique
- thoracic ventral rami
- Innervation of internal oblique
- thoracic and lumbar ventral rami
- Innervation of transversus abdominus
- thoracic and lumbar ventral rami
- Innervation of quadratus lumborum
- thoracic and lumbar ventral rami