The hand Flashcards
List the Carpals
Triquetrium.lunate, scaphoid, pisiform, hamate, capitate, trapazoid, trapezium
Ulnar nerve controls what in the hand
Controls the interossie
4-5 lumbricals
flexor digitorium profundus
Boutonnier Deformity
Hyper extension at the DIP and Flexion at the PIP
What is Swan Neck Deformity
Hyper extension of PIP
Flexion of DIP
Usually as a result of volar (palmar) PIP
Explain intrinsic vs Extrinsic in the hand
Intrinsic- muscles that start and end in the hand
Extrinsic- Muscles that start outside the hand, but end within the hand
Claw hand is
4-5 digit affected
flexion of PIP and DIP Extension of MCP
Ulnar never injury
Wrist Drop
A high injury to the radial nerve
Extensor Digitorum communis and major extensors of the wrist are rendered useless
What is Dupuytrens Disease
imbalance of collagen turn over
fascia tentsion
4-5 are affected
The median nerve controls what in the hand
passes through the carpal tunnel
sensation to forearm front and 1/2 4th digit
flexors of the forearm
largest % of pain fibers
The radial nerve controls what
- goes through dorsal forearm (posterior)
- innervated Extensor digitorum communis and most extensors
Volar =
palmar
Flexor digitorum pollicus
DIP
Flexor digitorum superficial
PIP
Extensor digitorum Communis
DIP
Interoissie and lumbricals
PIP
Interoissie
Abduction -Palmar
Adduction-Dorsal
Extend PIP ( lateral bands)
flex MCP
How many compartments are there in the wrist and hand
6
2 digits that are flixed in the hand
2-3
Extensory DIgitorum Communis do ?
Extends MCP
Muscle of thenar Eminence
flexor pollicus brevis
abductor pollicus brevis
adductor pollicus
openens pollicus
Hypothenar Eminence
Abductor digiti minimi
Flexor digiti minimi
Opponens digiti minimi
Palmaris Brevis
What 2 hands fractures are like 2 wrist fractures
Dorsal Angulation- Coles- Towards back of hand (dorsal)
Volar Angulation- Smiths- towards palm of hand
Lumbricals do?
Extemd DIP
Flexor Digitorum Pollicus
Flexes DIP as a group
What are the Creases of the palm
thenar- thumb
Proximal and distal palmar
Palmar digital MCP Joint
Proximal and distal IP fingers
What does Flexor Digitorum Superficials do
flexor PIP
What is Mallet finger
Extensor mechanism to DIP fails
Wrist drop
Injury of the Radial nerve
Extensor Digitorum Communis and Major extensors of the wrist are rendered useless
Hypothenar eminence makes up of which 4 muscles
Abd digiti minimi, flexor digiti minimi, oppenous digiti minimi, palmarus brevis
Lumbricals are important for ??
Pinch grip
What is the most mobile metacarpal ?
D5
How man compartment of the hand are they ?
6
What muscles consist of in compartments 1-6 in the hand
- extensor policies brevis and abd pollicus longus
- Extensor carpi radualis longus and brevis
- Extensor pollicus longus
- Extensor digitirum communis, extensor indicis prioria
- Extensor digiti minimi
- Extensors carpi ulnaris
What does synovial Shealth do ?
Protects /lubricates tendons
Juncture tendinae does what
Brings tendons into midline
Holds together
What’s us the primary extensor of the pip joint
Extensors digitorum communis
The primary extensor of the DIP Jt is
Lumbricals
