List of flexors of the human body

In anatomy, flexor is a muscle that contracts to perform flexion (from the Latin verb flectere, to bend), a movement that decreases the angle between the bones converging at a joint. For example, one's elbow joint flexes when one brings their hand closer to the shoulder, thus decreasing the angle between the upper arm and the forearm.

Flexors

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

Lower limb

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.