Abduction

Anatomical planes in a human

Abduction, in functional anatomy, is a movement which draws a limb away from the median (Sagittal) plane of the body. It is thus opposed to adduction.

Muscles of abduction

Upper limb

The coming together of two bones attached by a joint laterally

• of arm at shoulder^[1][2]
  • Supraspinatus (initiates motion)
  • Deltoid (continues motion)

• of hand at wrist^[3]
  • Flexor carpi radialis
  • Extensor carpi radialis longus
  • Extensor carpi radialis brevis
  • Abductor pollicis longus
  • Extensor pollicis longus
  • Extensor pollicis brevis

• of finger^[4]
  • Abductor digiti minimi
  • Dorsal interossei of the hand

• of thumb^[5]
  • Abductor pollicis longus
  • Abductor pollicis brevis

Lower limb

• of femur at hip^[6]
  • Gluteus medius
  • Gluteus minimus

• of toe^[7]
  • Abductor hallucis
  • Abductor digiti minimi
  • Dorsal interossei of the foot

Other

• vocal folds
  • Posterior cricoarytenoid muscle

• eyeball
  • Lateral rectus muscle
  • Superior oblique muscle
  • Inferior oblique muscle

References

1. ^ Shoulder Articulations
2. ^ Anatomy at Dartmouth shoulder/surface/ghsurface1
3. ^ Wrist Articulations
4. ^ Finger Articulations
5. ^ Thumb Articulations
6. ^ Hip Articulations
7. ^ Foot Articulations

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