- Male reproductive system
- Lymphatic system
- Skeletal system
- Head muscles
- Neck muscles
- Muscles of upper limb
- Thoracic muscles
- Muscles of back
- Muscles of lower limb
- Blood vessels
- Respiratory system
- Digestive system
- Endocrine glands
- Nervous system
- Female reproductive system
The adductor pollicis (Latin: musculus adductor pollicis) is a flat triangular-shaped muscle of the hand. Together with the abductor pollicis brevis, flexor pollicis brevis and opponens pollicis, it forms the thenar eminence. Therefore, the adductor pollicis is known as one of the four thenar muscles that lie on the lateral (radial) side of the palm. As the name suggests, the adductor pollicis provides the adduction of the thumb. This muscle has two heads - oblique and transverse.
Oblique head - capitate bone, bases of 2nd and 3rd metacarpal bones
Transverse head - base of 3rd metacarpal bone
|Insertion||Base of proximal phalanx of thumb|
|Innervation||Deep branch of ulnar nerve (C8, T1)|
|Blood supply||Deep palmar arch|
The oblique head of the adductor pollicis muscle originates from the capitate bone and bases of the second and third metacarpal bones. The transverse head arises from the base of the third metacarpal bone.
The adductor pollicis inserts on the base (medial side) of the proximal phalanx of the thumb.
The adductor pollicis muscle provides the adduction of the thumb at the first carpometacarpal joint.
The adductor pollicis is innervated by the deep branch of the ulnar nerve (C8, T1).