Please feel free to use this category scheme (from an old version of Gray's Anatomy now in the public domain) to arrange the muscle headings by the parts of the body.

• The muscles of the head.
  • The muscles of the scalp[?]
  • The muscles of the eyelid[?]
  • The muscles of the nose
  • The muscles of the mouth
  • The muscles of mastication[?]
• The muscles of the anterolateral region of the neck[?]
  • The superficial cervical muscle[?]
  • The lateral cervical muscles[?]
  • The supra- and infrahyoid muscles[?]
  • The anterior vertebral muscles[?]
  • The lateral vertebral muscles[?]
• The muscles of the trunk
  • The deep muscles of the back
  • The suboccipital muscles[?]
  • The muscles of the thorax[?]
  • The muscles of the abdomen
  • The muscles of the pelvis
  • The muscles of the perineum
• The muscles of the upper limb[?]
  • The muscles connecting the upper extremity to the vertebral column
  • The muscles connecting the upper extremity to the anterior and lateral thoracic walls
  • The muscles of the shoulder[?]
  • The muscles of the arm
    • biceps brachii muscle
  • The muscles of the forearm
    • flexor digitorum brevis muscle[?]
    • flexor digitorum longus muscle[?]
  • The muscles of the hand
• The muscles of the lower limb.
  • The muscles of the iliac region[?]
  • The muscles of the thigh
  • The muscles of the leg
  • The muscles of the foot

Specialised groupings

• Muscles of facial expression
  • Auricularis anterior muscle[?]
  • Buccinator muscle[?]
  • Corrugator supercilii muscle[?]
  • Depressor anguli oris muscle[?]
  • Depressor labii inferioris muscle[?]
  • Depressor septi nasi muscle[?]
  • Frontalis muscle[?]
  • Levator anguli oris muscle[?]
  • Levator labii supeioris muscle[?]
  • Levator labii superioris alaeque nasi muscle
  • Mentalis muscle[?]
  • Nasalis muscle[?]
  • Orbicularis oculi muscle[?]
  • Orbicularis oris muscle[?]
  • Platysma muscle[?]
  • Procerus muscle[?]
  • Risorius muscle[?]
  • Zygomaticus major muscle[?]
  • Zygomaticus minor muscle[?]

Sources:

• http://www.meddean.luc.edu/lumen/MedEd/GrossAnatomy/dissector/muscles/muscles.html
• http://www.ptcentral.com/muscles/
• http://www.rad.washington.edu/atlas2/