Unit 11: Hand Flashcards
How many bones are found in the hand?
27
What are the different categories of bone within the hand?
Carpals
Metacarpals
Phalanges (proximal, middle, distal)
What term is used to describe the yellow joints?
Interphalangeal articulations
What term is used to describe the green joints?
Metacarpophalangeal joints
What term is used to describe the red jonts?
Intercarpal articulations
What is the organisation of the carpal bones in the hand?
Proximal - 4 - articulate with forearm
Distal - 4 - articular with carpals
What are the different capate bones?
(way to remember)
So long to pink here comes the thumb (start at proximal under thumb and go in circle)
Scaphoid
Lunate
Triquetral
Pisiform
Hamate
Capitate
Trapezoid
Trapezium
Label the different carpal bones
Pink - scaphoid
Blue - lunate
Green - triquetrum
Red - pisiform
Blue - hamate
Yellow - capitate
Green - trapeziod
orange - trapezium
What is the clinical importance of the anatomical snuff box?
Is made by a gap between the outcropping ‘pollicis’ muscle of the extensor compartment of the forearm.
Contains the scaphoid bone - which is commonly injured when falling on an outstretched hand - can be palpated in this area - painful indicates injury.
Also contains the continuation of the radial artery
What are the different movements of the digits?
Do them?
Flexion /extension of the metacarpophalangeal joints and the interphalangeal joints
Abduction and adduction of the digits
What classification of muscles are responsible for which movements of the digits?
Extrinsic - flexion and extension
Intrinsic - flexion, extension, abduction and adduction
What are the different movements of the thumb?
Can you do them?
What are the extrinsic muscles of the hand?
Flexors for the digits and the thumb
Extensors for the digits and thumb
Abductor for the thumb
What are the intrinsic muscles groups of the hand?
Thenar muscles
Hypothenar muscles
Lumbricals
Interossei
Describe the location of the thenar muscles
Squidgy bit under the thumb
Describe the location of the hypothenar muscles
Squidgy bit under the little finger
What is the function of the hypothenar group?
Aids with grip
What muscles are found in the thenar group for intrinsic muscles of the hand?
Abductor pollicis brevis
Flexor policis brevis
Opponens pollicis