Hand ANATOMY

Question 1

What is the OINA for ABductor Pollicus Brevis?

on thumb

Answer 1

O: Scaphoid + Trapezium
I: Prox. phalanx of thumb
A: abducts thumb at MCP
N: Median nerve

Question 2

What is the OIAN for OPPONENS POLLICUS ?

thumb

Answer 2

O: trapezium
I: 1st MCP
A: medially rotate thumb into *opposition
N: Median

Question 3

What is the OIAN for FLEXOR POLLICUS BREVIS ?

|&raquo_space;SRTONGEST MUSCLE IN HAND!!!!!!!!
thumb

Answer 3

O: Trapezium
I: 1st prox. phalanx
A: flexes thumb MCP joint
N: median

Question 4

What is the OIAN for ADDUCTOR POLLICUS ?

-not like other nerve (abductor vs. adductor)

Answer 4

O: 2nd + 3rd MC and Capitate
I: Prox. Phalynx of thumb
A: adducts
N: Ulnar

Question 5

What is the OIAN for FLEXOR DIGITI MINIMI ?

D5-little finger

Answer 5

O: hook of hamate
I: prox. phalanx of D5 at MCP
A: flexes D5
N: Ulnar

Question 6

What is the OIAN for ABDUCTOR DIGITI MINIMI ?

D5

Answer 6

O: Pisiform + tendon of FCU (Flexor Capri Ulnaris
I: Prox. phalanx D5
A: abducts D5
N:Ulnar

Question 7

What is the OIAN for OPPONENS DIGITI MINIMI ?

Answer 7

O: Hook of Hamate
I: 5th Metacarpal
A: rotatese 5th MCP joint into opposition
N:Ulnar

Question 8

What is the OIAN for LUMBRICALS ?

Answer 8

O: tendons of FDP (Flexor digitorum profundus
I: Dorsal hoods of D2-D5
A: Flexion of MCP’s + Extension of IP joints D2-D5 (Lumbrical grip)
N: Median and Ulnar

Question 9

What is the OIAN for DORSAL INTEROSSEI ?

Answer 9

O: Adjacent sides of MC’s
I: Base of prox. phalanx of D2-D4
A: Abduction of D2 + D4
N: Ulnar

Question 10

What is the OIAN for PALMAR INTEROSSEI ?

Answer 10

O: D2-D5
I: Base of Prox. phalanx + extensor hoods D2-D5
A: adducts D2, D4+ D5
N: Ulnar

Question 11

?What are the 3 muscles in the Thenar Emminence?

Answer 11

1. Abductor Pollicis brevis
2. Opponens Pollicis
3. Flexor Pollicis Brevis

Question 12

?What are the 3 muscles in the Hypeprthenar Emminence?

Answer 12

1. Flexor Digiti Minimi
2. Abductor Digiti Minimi
3. Opponens Digiti Minimi

Question 13

What does DAB stand for?

Answer 13

Dorsal Interossei Abduction

Question 14

Where is the Thenar EMINENCE on your hand?

Answer 14

on your thumb side (everything under the thenar crease)

Question 15

Where is the Hyperthenar EMININCE?

Answer 15

at the ulnar side

Question 16

What joint is it at the thumb?

Answer 16

saddle joint

Question 17

what 2 directions is there for the arches of the hand?

Answer 17

1. Longitudinal

2. Transverse

Question 18

What is the Dupuytren’s contracture?

Answer 18

shortening of palmar fascia (D4 + D5) go down

Question 19

What is the trigger thumb?

Answer 19

• “snapping finger” (thumb)

- tendon go into sheaths (tunnnels) and because its inflamed it cant get through the tunnels

Question 20

*What is the Mallet finger?

Answer 20

-*torn tendon at DIP and it droops down

Question 21

*What is the Swan neck deformity?

Answer 21

• PIP hyper extension
• DIP flexion
• damage to volar plate

Question 22

*What is the Boutonniere deformity?

Answer 22

• *PIP flexed: torn tendon

- DIP hyper extended

Question 23

What is the Position of Rest?

Answer 23

wrist: extended
phalanges: slight flexion
thumb: partial oppositon

Question 24

What is the Position of Function?

Answer 24

wrist: extended
phalanges: flexed
thumb: abducted and opposition

Question 25

* Collateral ligaments of the MCP's are longest in ?

Answer 25

Flexion

Question 26

* Collateral ligaments of the MCPs are shortest in

Answer 26

Extension

Question 27

Why is it important to wear splints correctly?

Answer 27

to maintain Functional position of hand

Question 28

What happens to the Collateral ligaments if the hand slides back in a resting hand splint?

Answer 28

they all go into position of their SHORTEST position = maintaining Position of Deformity

Question 29

What is the Position of Deformity (if we leave inflammation in this position?)

Answer 29

MCP joints= extended | IP joints= flexed

Question 30

What are the 3 nerves of the Brachial Plexus ?

Answer 30

1. Radial 2. Median 3. Ulnar

Question 31

(What are the muscles that are innervated by the Median nerve? )

Answer 31

1. ABductor Pollicus Brevis 2. OPPONENS POLLICUS 3. FLEXOR POLLICUS BREVIS 4. LUMBRICALS

Question 32

(What are the muscles innervate by the Ulnar nerve?)

Answer 32

1. ADDUCTOR POLLICUS 2. FLEXOR DIGITI MINIMI 3. ABDUCTOR DIGITI MINIMI 4. PALMAR INTEROSSEI 5. DORSAL INTEROSSEI 6. LUMBRICALS 7. OPPONENS DIGITI MINIMI

Question 33

****What nerve is responsible for your Sensation?

Answer 33

Radial nerve

Question 34

***What nerve is responsible for your Sensation + Motor?

Answer 34

Sensation + Motor

Question 35

What are 2 steps to test intrinsic muscles?

Answer 35

Step 1: - MCPJ in extension - PIP passively stretched Step 2: - MCPJ in flexion - PIPJ passively flexed