Upper limb anatomy Flashcards
What are the four regions of the upper limb?
Shoulder
Arm
Forearm
Hand
What bones are found in the upper limb?
Scapula Clavicle Humerus Radius Ulna Bones of the hand
How many bones are there in the hand?
27
Name the bones of the hand.
Scaphoid Lunate Triquetrum Pisiform Hamate Capitate Trapezoid Trapezium Metacarpals Phalanges
What are the compartments of the hand?
Thenar eminence
Hypothenar eminence
Lumbricals
Interossei
How many muscles are found in the thenar eminence?
3
What three muscles are found in the thenar eminence and what is their function?
Abductor pollicis brevis- Abduct thumb
Flexor pollicis brevis- Flex thumb
Opponens pollicis- Oppose thumb
What nerve supplies the thenar compartment of the hand?
Medial nerve
How many muscles are found in the hypothenar compartment of the hand?
3
What three muscles are found in the hypothenar compartment of the hand and what is their function?
Abductor digiti minimi brevis- Abduct little finger
Flexor digiti minimi brevis- Flex little finger
Opponens digiti minimi- Oppose little finger
What nerve supplies the hypothenar compartment of the hand?
Deep branch of the ulnar nerve
How many lumbricals are there in the hand?
4
What do the lumbricals do?
Flex metacarpocarpal (MCC) joints Extend interphalangeal (IP) joints
What are the lumbricals innervated by?
1st and 2nd- Ulnar nerve
3rd and 4th- Medial Nerve
Where do the lumbricals originate?
Tendons of flexor digitorum profundus
Where do the lumbricals insert?
Phalanges of fingers
What are the two kinds of interossei muscle?
Dorsal
Palmer
What nerve innervates the interossei muscles?
Ulnar nerve
What doe the dorsal interossei muscles do?
Abduct fingers
What do the palmar interossei muscles do?
Adduct fingers
Where do the interossei muscles originate?
Metacarpals
Where do the interossei muscles insert?
proximal phalanges of fingers
What does abduction of the thumb look like?
Forwards
What does adduction of the thumb look like?
In line with fingers