Flexor Pollicis Longus

(noun)

A long, deep muscle responsible for flexing the thumb.

Related Terms

  • Flexor Carpi Ulnaris
  • Flexor Carpi Radialis
  • Flexor Digitorum Profundus
  • Flexor Digitorum Superficialis
  • Pronator quadratus
  • Palmaris Longus
  • Pronator Teres
  • extrinsic muscles
  • flexion
  • extension

Examples of Flexor Pollicis Longus in the following topics:

  • Muscles of the Wrist and Hand

    • Flexor Digitorum Profundus - A long muscle originating near the elbow and passing through into the wrist, lying adjacent to the flexor pollicis longus.
    • Flexor Pollicis Longus - A long muscle originating near the elbow and passing through into the wrist, lying adjacent to the flexor digitorum profundus.
    • Abductor Pollicis Longus – The abductor pollicis longus is situated immediately distal to the supinator muscle.
    • Extensor Pollicis Brevis – The extensor pollicis brevis is located below the abductor pollicis longus.
    • Abductor Pollicis Brevis – Located anteriorly to the opponens pollicis and proximal to the flexor pollicis brevis.
  • Muscles that Cause Movement at the Foot

    • Quadratus Plantae - The quadratus plantae muscle is located superior to the flexor digitorum longus tendons.
    • Attachments - Originates from the heel and attaches to the tendons of flexor digitorum longus.
    • Actions - Assists flexor digitorum longus in flexing the lateral four toes.
    • Lumbricals - The lumbricals are four small skeletal muscles, accessory to the tendons of the flexor digitorum longus and numbered from the medial side of the foot.
    • Attachments - Originates from the tendons of flexor digitorum longus.
  • Tibia and Fibula (The Leg)

    • These muscles originate from the fibula's surface and include the extensor digitorum longus, soleus, and flexor hallucis longus, among others.
  • Shin Splint Syndrome

    • Muscle imbalance, including weakened core muscles lead to more lower-extremity injuries; also the inflexibility and tightness of the gastrocnemius, soleus, and plantar muscles (commonly the flexor digitorum longus) can contribute to shin splints.
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