Flexor Digitorum Superficialis

Parent Structures

• Superficial Anterior Muscles of the Forearm

Proximal/Superior Attachment

• Anterior Ulnar Collateral Ligament
• Coronoid Process - Sublime Tubercle at the upper medial part
• Medial Epicondyle - Common Felxor Tendon
• Radius - Upper Two-Thirds of the Anterior Border

Distal/Inferior Attachment

• Base of 2nd Middle Phalanx of the Hand - Palmar Surface
• Base of 3rd Middle Phalanx of the Hand - Palmar Surface
• Base of 4th Middle Phalanx of the Hand - Palmar Surface
• Base of 5th Middle Phalanx of the Hand

Joint Actions

• Agonist
  • 2nd Metacarpophalangeal Joint (2nd MCP)
    • Flexion
  • 3rd Metacarpophalangeal Joint (3rd MCP)
    • Flexion
  • 4th Metacarpophalangeal Joint (4th MCP)
    • Flexion
  • 5th Metacarpophalangeal Joint (5th MCP)
    • Flexion
  • PIP of the 2nd Phalanx of the Hand
    • Flexion
  • PIP of the 3rd Phalanx of the Hand
    • Flexion
  • PIP of the 4th Phalanx of the Hand
    • Flexion
  • PIP of the 5th Phalanx of the Hand
    • Flexion
  • Wrist
    • Flexion - After fingers fully flexed

Nerve Innervation

• Median Nerve