What are the 11 muscles that make up the intrinsic muscles of the finger joints?

This mnemonic recalls the intrinsic muscles of the hand in their relative palmar anatomical position from lateral to medial:

  • A: abductor pollicis brevis.
  • F: flexor pollicis brevis.
  • O: opponens pollicis.
  • A: adductor pollicis.
  • O: opponens digiti minimi.
  • F: flexor digiti minimi.
  • A: abductor digiti minimi.

What are the muscles found in the hands?

Hand Muscles

  • Interossei (dorsal and palmar) The interossei muscles begin between the bones of the hand.
  • Hypothenar.
  • Thenar.
  • Lumbricals.
  • Adductor Pollicis.
  • Abductor pollicis longus.
  • Biceps.
  • Brachialis.

What are the pad and dab muscles?

The “P” in PAD stands for the palmar interossei. Interossei muscles on the palmar surface adduct the fingers, bringing them towards the midline. The “D” in DAB stands for dorsal interossei. The dorsally placed interossei permit abduction of the phalanges, moving them away from the midline.

What are the five intrinsic muscles of the hand?


  • Intrinsic Muscles of the Hand.
  • Thenar Muscles:
  • Abductor pollicis brevis (APB)
  • Flexor pollicis brevis (FBB)
  • Opponens pollicis (OPP)
  • Intrinsic Thumb Adduction Component:
  • Adductor pollicis.
  • Hypothenar Muscles:

How many hand muscles are there?

30 muscles
There are over 30 muscles in the hand, working together in a highly complex way. Movements of the hand are mostly started by muscles in the forearm.

What is FDI muscle?

Usually, the first dorsal interosseous muscle (FDI) is innervated by the deep branch of the ulnar nerve, which makes abnormal innervation challenging to detect. This difficulty is increased in CuTS patients, many of whom have atrophy. However, the anatomical variations in the FDI will manifest clinically.

Where is FDI muscle?

In human anatomy, the dorsal interossei (DI) are four muscles in the back of the hand that act to abduct (spread) the index, middle, and ring fingers away from hand’s midline (ray of middle finger) and assist in flexion at the metacarpophalangeal joints and extension at the interphalangeal joints of the index, middle …

How can I remember my wrist flexors?

Starting from the index finger count – “Pass, Fail, Pass, Fail, and Fail (at last)” i.e. Pronator teres (PT), Flexor carpi radialis (FCR), Palmaris longus (PL), Flexor carpi ulnaris (FCU) and Flexor digitorum superficialis (FDS) resectively.

What are the extrinsic and intrinsic muscles of the hand?

The extrinsic muscle groups are the long flexors and extensors. They are called extrinsic because the muscle belly is located on the forearm. The intrinsic group is the smaller muscles located within the hand itself. The hand muscles are innervated by the radial, median, and ulnar nerves from the brachial plexus.