Bassett Collection of Stereoscopic Images of Human Anatomy

Dissection of anterolateral abdominal wall

Pyramidalis muscle, anterior view; nerve and artery to muscle

Image #134-7

KEYWORDS: Muscles and tendons, Peripheral nervous system, Vasculature.

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Higher resolution images are available for a fee. Contact Drew Bourn, PhD, MLIS.

Dissection of anterolateral abdominal wall
Pyramidalis muscle, anterior view; nerve and artery to muscle
The rectus sheath has been opened to the right of the midline. The aponeurosis of the external oblique (3) has been reflected on the right side and on the left it has been cut off lateral to the midline (10). The nerve (5) which reaches the right pyramidalis muscle (4) is a branch of the iliohypogastric nerve in this specimen.
1 . Right rectus abdominis muscle
2 . Sheath of rectus abdominis muscle (cut edge)
3 . Aponeurosis external oblique muscle
4 . Right pyramidalis muscle
5 . Artery and nerve entering pyramidalis muscle
6 . Superficial inguinal lymph node
7 . Superficial fascia
8 . Linea alba
9 . Sheath of rectus abdominis muscle
10 . Upper pointer: Aponeurosis external oblique muscle (cut off) Lower pointer: Reflected inguinal ligament
11 . Left pyramidalis muscle (faintly visible through rectus sheath)
12 . Iliohypogastric nerve
13 . Conjoint tendon
14 . Ligamentum teres (of uterus)
15 . Pubic tubercle
16 . Pubic symphysis (covered by sheath of rectus)
17 . External pudendal artery
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