Pyramidalis

Description

Pyramidalis

Anterior abdominal wall showing PM. PM, pyramidalis muscle; U, umbilicus; RAM, rectus abdominis muscle; DUP, distance between umbilicus to pubic symphysis; DUA, distance between umbilicus to apex of the muscle; RS, rectus sheath; A, above; L, left.

Name

• Pyramidalis
• Musculus Pyramidalis

General

• Small triangular muscle anterior to rectus abdominis
• Helps stabilize and protect the linea alba and abdominal organs

Origin

• Pubic Symphysis
• Pubic Crest

Insertion

• Linea Alba

Actions

• Stabilizes/tenses linea alba (protects abdominal organs)
• Assists in forced respiration, urination, and defecation

Vascular Supply

• Inferior Epigastric Arteries

Innervation

• Subcostal Nerve

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Clinical Significance

• Needs to be updated

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See Also

• Physical Exam Torso
• Torso Anatomy (Main)
• Abdominal Pain (Main)

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