Week 4

Lab 5 - Muscular Organization and Segmental Body Plan

Define & identify on skeleton

Microstructure (Identify on picture)

  • Actin
  • Myosin
  • Z line
  • A band
  • I band
  • H zone
  • M line

Musculature

Identify on Human, dissect on cat. Learn: Origin, insertion, antagonist, synergist, action, homologues (where appropriate).

Hypaxial Muscles

  • External Oblique
  • Internal Oblique
  • Transversus Abdominus
  • Rectus Abdominus
  • External Intercostals
  • Internal Intercostals
  • Aponeurosis

Epaxial Muscles

  • Thoracolumbar facia
  • Erector Spinae Group:
    • Medial: Interspinalis
    • Intermediate: Longissimus
    • Lateral: Iliocostalis