Adduction

Anatomical planes in a human

Adduction is a form of movement in animal biology which brings a part of the anatomy closer to the sagittal plane of the body. The opposite of adduction is abduction.

Muscles of adduction

Upper limb

of arm at shoulder (lowering arm)^[1]
- Subscapularis
- Teres major
- Pectoralis major
- Infraspinatus
- Triceps brachii (caput longum)
- Latissimus dorsi
- Coracobrachialis

of hand at wrist^[2]
- Flexor carpi ulnaris
- Extensor carpi ulnaris

of fingers^[3]
- Palmar interossei

of thumb^[4]
- Adductor pollicis

Lower limb

of thigh at hip^[5]
- medial compartment of thigh/adductor muscles of the hip

of toes (S2-S3)^[6]
- Adductor hallucis
- Plantar interossei

Other

vocal folds
- Lateral cricoarytenoid muscle

eyeball

Adduction in Scallops

Scallops have a central adductor muscle. It lets them open and close their shells. It is quite large and developed compared to other bivalves because they swim a lot.