HUMB1002 Lecture Notes - Lecture 6: Thoracic Wall, Conjoint Tendon, Abdomen

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Bones
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True ribs= 1-7
➢
➢
Floating ribs= 11-12
➢
Ribs & Costal cartilages
Sternal angle
(manubriosternal joint)
Ribs
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Semi-lunar line
âť–
Linea alba
âť–
Inguinal line
âť–
Lines in Thorax
Thursday, 31 May 2018
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Document Summary

Central tendon costal margin, posterior abdominal wall & superior lumbar vertebrae. Interchondral part: elevates ribs during inspiration the central part descends during inspiration; primary muscle of inspiration. 5 (cid:1005)(cid:1006) thoraco a(cid:271)do(cid:373)i(cid:374)al nerve linea alba, pubic tubercle, lateral part of inguinal ligament, a(cid:374)terior ilia(cid:272) crest. Ipsilateral trunk flexion & contralateral trunk rotation, compression & support abdominal viscera. Oblique thoracolumbar fascia, anterior 2/3 iliac crest, lateral inguinal ligament. Ipsilateral trunk flexion & rotation, compression & support abdominal viscera thoraco a(cid:271)do(cid:373)i(cid:374)al nerve & 1st lumbar nerve inferior border of ribs 10 (cid:1005)(cid:1006), linea alba, pecten pubis via conjoint tendon. Mostly due to forceful contraction of the muscles of the anterolateral abdominal wall. Increases transverse diametre of the rib cage in the frontal plane about a sagittal axis. Lower rib costotransverse joint gliding results in the bucket-handle movement. The internal intercostal muscles function to increase the transverse dimension of the thorax by causing elevation of the ribs at the 7th-10th costovertebral joints during inspiration.

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