Movements and Muscles of the Hand Flashcards Preview

Medicine, Year 2, Block 12 (Neurological, Neuromuscular, and MSK Diseases) > Movements and Muscles of the Hand > Flashcards

Flashcards in Movements and Muscles of the Hand Deck (18):
1

From lateral to medial, state the names of the 8 bones in the wrist

Top row:
Trapezium - Trapezoid - Capitate - Hamate

Bottom row: Scaphoid - Lunate - Triquetral - Pisiform

2

Where do the Lumbrical muscles originate from and where do they insert?

From the radial side of the profundus tendon, inserting onto the extensor apparatus

3

What is the innervation of the Lumbrical muscles?

Lateral two lumbricals (index and middle finger) = Median nerve

Medial two lumbricals (ring and pink) = Ulnar nerve

4

What is the function of the Lumbrical muscles?

Flexion of the MCP joints whilst keeping IP joints extended

5

What are the three muscles of the Thenar eminence?

Opponens Pollicis
Abductor Pollicis Brevis
Flexor Pollicis Brevis

OAF

6

What are the Thenar eminence muscles nerve supply?

Median nerve

7

What are the three muscles of the Hypothenar eminence?

Opponens Digiti Minimi
Abductor Digiti Minimi
Flexor Digiti Minimi Brevis

OAF

8

What are Hypothenar Eminence nerve supply?

Ulnar nerve

9

What are the roles of the Palmar and Dorsal Interossei muscles?

Dorsal Interossei - Abduction of the fingers at the MCP

Palmar Interossei - Adduction of the fingers at the MCP

10

What is the nerve supply for the Interossei muscles?

Ulnar nerve

11

What is the nerve supply for the Adductor Pollicies?

Ulnar nerve

12

What is the nerve supply for Palmaris Brevis?

Ulnar nerve

13

Abduction of the thumb tests what nerve purely?

Medial nerve

14

Adduction of the thumb tests what nerve purely?

Ulnar nerve

15

Which of the Lumbricals are unipennate and bipennate?

Lateral two lumbricals: Unipennate

Medial two lumbricals: Bipennate

16

What artery is the root for the Superficial palmar branch of the hand and supplies blood for the four fingers (ulnar side of index)?

Ulnar artery

17

What artery is the root for the Deep palmar branch of the hand and supplies blood for the radial side of the index and the thumb?

Radial artery

18

What is the specific branch artery of the Deep palmar arch which supplies the thumb?

Princeps pollicis artery