Intrinsic Muscles Innervated by the Median Nerve

1. Flexor pollicis brevis

2. Abductor Pollicis Brevis

3. Opponens Pollicis

4. Lumbricals

Function of the Flexor Pollicis Brevis

Flexion of CMC and MCP joints of thumb

Abductor Pollicis Brevis Function

Abducts CMC joint of the thumb/Palmar Abduction

Opponens Pollicis Function

Opposition of the thumb at the CMC joint

Function of the Lumbricals (Radial Side)

MCP flexion and extension of the IP joints of index and middle finger (or 2nd and 3rd digit)

What are the intrinsic muscles innervated by the ulnar nerve?

1. Abductor Digiti Minimi

2. Opponens Digiti Minimi

3. Flexor Digiti Minimi

4. Adductor Pollicis

5. Lumbricals

6. Palmar Interossei

7. Dorsal Interossei

Function of the Abductor Digiti Minimi

Abduction of the fifth digit

Function of the Opponens Digiti Minimi

opposition of the 5th digit

Function of the Flexor Digiti Minimi

Flexion of the MCP joint and opposition of the 5th digit

Function of the Adductor Pollicis

Adducts the CMC joint of the thumb

Function of the Lumbricals

MCP flexion and extension of the IP joints of 4th and 5th digits

Function of the Palmar Interossei (Think PAD)

Abduction of digits 1,2,4 &5 and provides assistance with MCP flexion & Extension of IP joints of digits 2 -5.

Dorsal Interossei Muscles Function

Abduction of the index, middle (both ways) and ring finger and assists in flexion at the MCP joints and extension of the IP joints of these fingers.

What are the extrinsic flexor  muscles innervated by the Median Nerve?

1. Flexor Digitorum Superficialis

2. Flexor Digitorum Profundus

3. Flexor Pollicis Longus

What is the function of the Flexor Digitorum Superficialis and its nerve innervation?

Function: flexion of the PIP jts of digits 2-5. 

Nerve innervation: median nerve 

Function and Nerve Innervation of the Flexor Digitorum Profundus

Function: Flexion  of DIP of digits 2-5

Nerve Innervation: Median nerve digits 2&3, ulnar nerve digits 4&5

Function and Nerve innervation of Flexor Pollicis Longus?

Function: Flexion of the IP jt of thumb

Nerve Innervation: Median N. 

What is the one extrinsic flexor of the hand and its nerve innervation?

1. Flexor Digitorum Profundus

Nerve innervation: ulnar n digits 4&5

What are the extrinsic extensor muscles innervated by the radial nerve?

1. Extensor digitorum muscle

2. Extensor digiti minimi

3. Extensor indicis 

4. Extensor Pollicis Longus

5. Extensor Pollicis Brevis

6. Abductor pollicis longus

What is the function of the extensor digitorum muscle?

Function: extension of MCP jts and contribution to extension of IP joints of digits 2 -5

What is the function of the extensor digiti minimi?

Function: extension of MCP jt of 5th digit and contribution to extension of IP jts of digits 2-5

Function of Extensor Pollicis longus

Function: extension of the IP joint of the thumb

Function of the Extensor Pollicis brevis?

Function: Extension of the CMC and MCP joints of the thumb

Function of the Abductor Pollicis Longus?

Function: Abduction and Extension of the CMC joint of the thumb