Anatomy Of Hand

Question 1

Scaphoid of tubercle, trapezium tubercle, hook of hamate and pisiform gives attachment to

Answer 1

Flexor retinaculum

Question 2

Fracture of scaphoid, recovery is?

Answer 2

Slow because poor bloody supply to proximal part, avascular necrosis

Question 3

Which bone develops in tendon of flexor carpi ulnaris?

Answer 3

Pisiform

Question 4

Radicarpal joint is what type?

Answer 4

Condyloid

Question 5

Ulnar and radial collateral ligaments limit?

Answer 5

Abduction and adduction

Question 6

Ligaments on palmar and dorsal surface?

Answer 6

Limits extension and flexion

Question 7

Carpometacarpal joints are what type of joints?

Answer 7

Plane joint, limited movement except for saddle joint, trapezium and metacarpal of d1 which enables opposition

Question 8

Metacarpalphalangeal joints are what type of joints?

Answer 8

Condylar

Question 9

What keeps the metacarpals joined together

Answer 9

Deep transverse metacarpal ligaments. Only between D2 and d5

Question 10

Interphalangeal joint is what type?

Answer 10

Hinge

Question 11

Palmar aponeurosis is continuous with what and comprises of what?

Answer 11

Palmaris longus

Longitudinal fibre and transverse fibres

Question 12

What passes though carpal tunnel?

Answer 12

Flexor digitorum superficialis
Flexor digitorum profundus
Flexor pollicis longus
Median nerve

Question 13

What does flexor retinaculum do?

Answer 13

Prevents bowing of tendons

Question 14

Where does splitting happen?

Answer 14

Flexor digitorum superficialis splits to allow flexor digitorum profundus to pass through and attach on distal phalanx

Question 15

Synovial sheath is bound by?

Answer 15

Annular and cruciate bands of fibrous digital sheath

Question 16

Flexor digitorum superficialis terminates on?

Answer 16

Base of middle phalanx

Question 17

Flexor digitorum profundus terminates on?

Answer 17

Base of distal phalanx

Question 18

Vinculae?

Answer 18

Attach tendons to phalanges

Question 19

What happens at insertion of long extensor tendons to digits?

Answer 19

Extensor hood/dorsal digital expansion (triangular aponeurosis)

Medial band onto medial phalanx and lateral band into distal phalanx

Question 20

Anatomical snuff box is formed of?

Answer 20

Medial/posterior border- extensor pollicis longus

Laterally- extensor polllicis brevis and abductor pollicis longus

Base formed by scaphoid and trapezium

Question 21

Which muscles insert onto extensor hoods

Answer 21

Lumbricals and interossei

Question 22

Lumbricals origin and insertion?

Answer 22

Flexor digitorum profundus tendons to extensor hood

2/3 unipennate
4/5 bipennate

Question 23

What do lumbricals do?

Answer 23

Extend interphalngeal joints and flex MCP joints

For precision grip

Question 24

Nerve supply to lumbricals?

Answer 24

2/3median nerve

4/5 ulnar nerve

Question 25

Interossie sit between?

Answer 25

Metacarpals

Question 26

Palmar interossie origin and insertion?

Answer 26

Metacarpals to extensor hoods D2 d4 d5

Question 27

What do palmar interossie do?

Answer 27

Adduct MCP joints

Question 28

No palmar interossie for D1 and D3 so action performed by?

Answer 28

Adductor pollicis muscle for thumb

Question 29

Dorsal interossei function?

Answer 29

Abduct MCP joints

Question 30

Dorsal interossie origin and insertion?

Answer 30

Metacarpals to extensor hoods D2 d3 x2 and d4

Question 31

No dorsal interossie for D1 and d5 as this is performed by?

Answer 31

Thenar hypothenar

Question 32

Origin of thenar and hypothenar muscles?

Answer 32

Flexor retinaculum and adjacent carpal bones

Question 33

Thenar muscles contain?

Answer 33

Opponens pollicis into first metacarpal Abductor pollicis brevis into proximal phalanx Flexor pollicis brevis

Question 34

Adductor pollicis origin and insertion?

Answer 34

Oblique head- base 2/3 metacarpal and carpal bones Transverse head- 3rd metacarpal Insert into promximal phalanx Deep to thenar muscles

Question 35

What supplies blood thumb and half of index finger?

Answer 35

Princeps pollicis artery and radialis indicis artery- both branches of radial artery

Question 36

Ulnar artery gives off?

Answer 36

Common palmar digital arteries then divide to give proper palmer digital arteries 1/2 D2 to d5

Question 37

Median nerve supplies?

Answer 37

Thenar muscles and first 2 lumbricals And gives off palmar branch before it enters carpal tunnel, supplying skin of palm Sensory to d1 to 1/2 d4

Question 38

Ulnar nerve supplies?

Answer 38

HIMLA Hypothenar Interossie Medial 2 lumbricals Adductor pollicis And superficial branch to 1/2 d4 and d5

Question 39

Clawed hand?

Answer 39

Damage to ulnar nerve at wrist D4 and d5 Hyperextension and MCP and flexion at interphalnageal joints Due to lack of lumbrical action

Question 40

What is responsible for dupuytren’s contracture?

Answer 40

Palmar aponeurosis

Question 41

What surrounds tendons?

Answer 41

Synovial sheaths

Question 42

Why are extensor hoods important?

Answer 42

Attachment for intrinsic muscles

Question 43

What is clinical importance of anatomical snuff box?

Answer 43

Radial pulse and palpate scaphoid

Question 44

Which lumbricals does median nerve supply?

Answer 44

D2/d3 Ulnar supplies d4/d5

Question 45

Hypothenar muscles?

Answer 45

Opponens digiti minimi- deepest into 5th metacarpal Abductor digiti minimi into proximal phalanx Flexor digiti minimi- proximal phalanx

Question 46

Radial artery supplies?

Answer 46

D1 and 1/2 D2