Hand Flashcards
1st Carpometacarpal Joint Type
Saddle
2nd-5th Carpometacarpal Joint Movements Permitted
Immobile
1st Carpometacarpal Movement Permitted
Flex/Ext
Abd/Add
Rotation
2-5 Metacarpophalanngeal Joint Type
Chondyloid
2-5 Metacarpophalangeal Movements Permitted
Flex/Ext
Abd/Add
1-5 Interphalangeal and 1 Metacarpophalangeal Joint Type
Hinge
1-5 Interphalangeal and 1 Metacarpophalangeal Joint Movmeent Permitted
Flex/ext
Palmar Ligament
Forms floor of fibroosseous tunnel (digits
Collateral Ligament
Reinforces sides of digital joints
Deep Transverse Ligament
Prevents flaying open of digital joints
Flexor Retinaculum Function
Prevents Bowstringing
Fibrous Digital Sheaths Function
Form roof of fibroosseous tunnel = prevents bowstringing
Synovial Sheath
Cylindrical bursa lines digital fibroosseous tunnel
Which digital bursa is not independent
5th
Dorsal Interossei Nerve
Ulnar (Deep)
Dorsal Interossei Bi/Unipennate?
Bi
Dorsal Interossei Insertion
DDEH
Dorsal Interossei Movement
Adduct digits 2 3 4
Palmar Interossei Nerve
Ulnar (deep)
Palmar Interossei Uni/Bipennate
Uni
Palamr Interossei Insertion
DDEH
Palmar Interossei Movementn
Adducts digits 1* 2 4 5 (1* really Flexion due to joint)
Adductor Pollicis Nerve
Ulnar (Deep)
Adductor Pollicis Uni/Bipennate
Bi
What runs between two heads of adductor pollicis
Radial Artery
Adductor Pollciis Insertion
DDEH
Adductor Pollicics Movement
Adducts thumb (strong so able to overcome the joint that normally prevents this)
Lateral Lumbricals Nerve
Median
Lateral Lumbricals Bi/Unipennate
Uni
Lumbricals origin
FDP Tendon
Lumbricals Insertion
LATERALLY on the DDEH
What do Lumbricals do
Link FDP to DDEH = channels intended movement elsewhere, allowing for independent Flexion and extension of the digital joints by cancelling out unwanted action
What does DDEH do
Links all digitial joints and prevents bowstringing
Thenar Muscles Where
Base thumb
Thenar Muscle Nerve
Median
Abductor Pollicis Brevis Insertion
DDEH
Flexor Pollicis Brevis Insertion
DDEH
Opponens Pollicis Insertion
1st Metacarpal
Hypothenar Muscles Where
Base of 5th digit
Hypothenar Muscles Nerve
Ulnar Deep
Abductor Digiti Minimi Insertion
DDEH
Flexor Digiti Minimi Insertion
DDEH
Opponens Digiti Minimi Insertion
5th Metacarpal
Opposition movement
Brings digit into centre of palm via rotation
Abductors, flexors and Opponens muscle positions
Deep = Opponens
Medial = Flexors
Lateral = Abductors
Ulnar under/over flexor retinaculum
Over (therefore not in carpal tunnel)
Median nerve Under/over flexor retinaculum
Under (therefore through carpal tunnel)
Cutaneous Hand Nerve Branching
Superficial Ulnar / Median -> Common Palamr Digital -> Proper Palmar Digital
Cutaneous Hand Median Nerve
Lat 3.5 digits:
Ant Base + Tips
Post Tips
Cutaneous Hand Ulnar Nerve
Medial 1.5 Digits:
Ant and Post Tips and Base
Cutaneous Hadn Radial Nerve
Post Base Lat 3.5 digits
Hand Blood SUpply Branching
Radial + Ulnar -> Deep/Sup branches -> Depp/sup Palamr arches
Sup Palmar Arch -> Common Palmar Digital -> Proper
Deep joints common via palmar metacarpal vessels