List of flexors of the human body

A flexor is a muscle that flexes a joint. In anatomy, flexion (from the Latin verb flectere, to bend) is a joint movement that decreases the angle between the bones that converge at the joint. For example, one's elbow joint flexes when one brings their hand closer to the shoulder. Flexion is typically instigated by muscle contraction of a flexor.

Upper limb

 * of the humerus bone (the bone in the upper arm) at the shoulder
 * Pectoralis major
 * Anterior deltoid
 * Coracobrachialis
 * Biceps brachii
 * of the forearm at the elbow
 * Brachialis
 * Brachioradialis
 * Biceps brachii
 * of carpus (the carpal bones) at the wrist
 * flexor carpi radialis
 * flexor carpi ulnaris
 * palmaris longus
 * of the hand
 * flexor pollicis longus muscle
 * flexor pollicis brevis muscle
 * flexor digitorum profundus muscle
 * flexor digitorum superficialis muscle

Hip
The hip flexors are (in descending order of importance to the action of flexing the hip joint):


 * Collectively known as the iliopsoas or inner hip muscles:
 * Psoas major
 * Iliacus muscle
 * Anterior compartment of thigh
 * Rectus femoris (part of the quadriceps muscle group)
 * Sartorius
 * One of the gluteal muscles:
 * Tensor fasciae latae
 * Medial compartment of thigh
 * Pectineus
 * Adductor longus
 * Adductor brevis
 * Gracilis

Without the iliopsoas muscles, flexion in sitting position is not possible across the horizontal plane.

Thigh

 * of thigh at knee (L5-S2)
 * Biceps femoris
 * Semitendinosus
 * Semimembranosus
 * Gracilis
 * Sartorius
 * Gastrocnemius
 * Popliteus
 * Plantaris (negligible)


 * of toes
 * Posterior compartment of leg
 * Flexor hallucis longus
 * Flexor digitorum longus
 * Flexor digitorum brevis
 * Quadratus plantae
 * Flexor hallucis brevis
 * Flexor digiti minimi brevis
 * of proximal phalanges at metatarsophalangeal joint
 * Lumbrical muscle (foot)
 * Plantar interossei
 * Dorsal interossei

Other

 * torso/lumbar vertebrae
 * Rectus abdominis muscle
 * neck at atlanto-occipital joint
 * Longus capitis muscle
 * Longus colli muscle