Hand ANATOMY Flashcards
What is the OINA for ABductor Pollicus Brevis?
on thumb
O: Scaphoid + Trapezium
I: Prox. phalanx of thumb
A: abducts thumb at MCP
N: Median nerve
What is the OIAN for OPPONENS POLLICUS ?
thumb
O: trapezium
I: 1st MCP
A: medially rotate thumb into *opposition
N: Median
What is the OIAN for FLEXOR POLLICUS BREVIS ?
|»_space;SRTONGEST MUSCLE IN HAND!!!!!!!!
thumb
O: Trapezium
I: 1st prox. phalanx
A: flexes thumb MCP joint
N: median
What is the OIAN for ADDUCTOR POLLICUS ?
-not like other nerve (abductor vs. adductor)
O: 2nd + 3rd MC and Capitate
I: Prox. Phalynx of thumb
A: adducts
N: Ulnar
What is the OIAN for FLEXOR DIGITI MINIMI ?
D5-little finger
O: hook of hamate
I: prox. phalanx of D5 at MCP
A: flexes D5
N: Ulnar
What is the OIAN for ABDUCTOR DIGITI MINIMI ?
D5
O: Pisiform + tendon of FCU (Flexor Capri Ulnaris
I: Prox. phalanx D5
A: abducts D5
N:Ulnar
What is the OIAN for OPPONENS DIGITI MINIMI ?
O: Hook of Hamate
I: 5th Metacarpal
A: rotatese 5th MCP joint into opposition
N:Ulnar
What is the OIAN for LUMBRICALS ?
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
What is the OIAN for DORSAL INTEROSSEI ?
O: Adjacent sides of MC’s
I: Base of prox. phalanx of D2-D4
A: Abduction of D2 + D4
N: Ulnar
What is the OIAN for PALMAR INTEROSSEI ?
O: D2-D5
I: Base of Prox. phalanx + extensor hoods D2-D5
A: adducts D2, D4+ D5
N: Ulnar
?What are the 3 muscles in the Thenar Emminence?
- Abductor Pollicis brevis
- Opponens Pollicis
- Flexor Pollicis Brevis
?What are the 3 muscles in the Hypeprthenar Emminence?
- Flexor Digiti Minimi
- Abductor Digiti Minimi
- Opponens Digiti Minimi
What does DAB stand for?
Dorsal Interossei Abduction
Where is the Thenar EMINENCE on your hand?
on your thumb side (everything under the thenar crease)
Where is the Hyperthenar EMININCE?
at the ulnar side
What joint is it at the thumb?
saddle joint
what 2 directions is there for the arches of the hand?
- Longitudinal
2. Transverse
What is the Dupuytren’s contracture?
shortening of palmar fascia (D4 + D5) go down
What is the trigger thumb?
- “snapping finger” (thumb)
- tendon go into sheaths (tunnnels) and because its inflamed it cant get through the tunnels
*What is the Mallet finger?
-*torn tendon at DIP and it droops down
*What is the Swan neck deformity?
- PIP hyper extension
- DIP flexion
- damage to volar plate
*What is the Boutonniere deformity?
- *PIP flexed: torn tendon
- DIP hyper extended
What is the Position of Rest?
wrist: extended
phalanges: slight flexion
thumb: partial oppositon
What is the Position of Function?
wrist: extended
phalanges: flexed
thumb: abducted and opposition
- Collateral ligaments of the MCP’s are longest in ?
Flexion
- Collateral ligaments of the MCPs are shortest in
Extension
Why is it important to wear splints correctly?
to maintain Functional position of hand
What happens to the Collateral ligaments if the hand slides back in a resting hand splint?
they all go into position of their SHORTEST position = maintaining Position of Deformity
What is the Position of Deformity (if we leave inflammation in this position?)
MCP joints= extended
IP joints= flexed
What are the 3 nerves of the Brachial Plexus ?
- Radial
- Median
- Ulnar
(What are the muscles that are innervated by the Median nerve? )
- ABductor Pollicus Brevis
- OPPONENS POLLICUS
- FLEXOR POLLICUS BREVIS
- LUMBRICALS
(What are the muscles innervate by the Ulnar nerve?)
- ADDUCTOR POLLICUS
- FLEXOR DIGITI MINIMI
- ABDUCTOR DIGITI MINIMI
- PALMAR INTEROSSEI
- DORSAL INTEROSSEI
- LUMBRICALS
- OPPONENS DIGITI MINIMI
**What nerve is responsible for your Sensation?
Radial nerve
***What nerve is responsible for your Sensation + Motor?
Sensation + Motor
What are 2 steps to test intrinsic muscles?
Step 1:
- MCPJ in extension
- PIP passively stretched
Step 2:
- MCPJ in flexion
- PIPJ passively flexed
