Q14 Transversus Adbominus

Question 1

Give the position of this muscle

Answer 1

Deepest sheet of the abdominal muscles, fibres are arranged horizontally or transversely in the anterolateral abdominal wall

Question 2

State the attachments of this muscle

Answer 2

PROXIMAL- lateral 1/3 of the inguinal ligament, anterior 2/3 of the inner lip of the iliac crest. Thoracolumbar fascia and superiorly from the inner surface of the costal cartilages of the lower 6 ribs. DISTAL- By the aponeurotic sheet to the linea alba. By the conjoint tendon to the pubic crest and the pecten pubis.

Question 3

State the action of this muscle

Answer 3

Compression and support of the abdominal viscera. Increases intra-abdominal pressure so giving support to the lumbar spine

Question 4

State 2 functional activities in which this abdominal muscle plays an important role

Answer 4

Produces pelvic tilt, maintaining the correct angle of the pelvis for posture and walking. Draws up pelvis in lateral flexion, important when walking with crutches. Sneezing, vomiting, micturition etc