Upper Limb Flashcards
What nerve innervates that posterior arm and posterior forearm?
Radial Nerve
What nerve innervates the anterior arm?
Musculocutaneous nerve
What innervates the anterior forearm?
Mainly median nerve
(Some ulnar nerve)
What innervates the intrinsic muscles of the hand?
Mainly Ulnar nerve
(Some median)
What is the Pneumonic for remembering the muscles of the Anterior arm?
BBC
What are muscle of the anterior arm?
Use the Pneumonic
Brachialis
Biceps brachii
Coracobrachialis
What nerve innervates the Brachialis, Biceps brachii and Coracobrachialis?
Musculocutaneous nerve
What are the 2 parts of the Biceps brachii called?
Long head of biceps
Short head of biceps
What 2 muscles of the anterior arm share an origin? (They bifurcate from the same tendon)
What is this origin?
Coracobrachialis
Short head of biceps brachii
Origin = Coracoid process of Scapula
Where does the Coracobrachialis insert?
Humerus (medial side of shaft)
Where is the long head of biceps in relation to the short head of biceps brachii?
Lateral to short head of biceps
Think LL Long head Lateral
Short head of biceps is medial
Where is the origin of the long head of biceps?
Tendon from Supraglenoid tubercle
What are the 2 places which the biceps brachii (both heads) insert?
They both come together to form a single tendon
Inserts:
-Radial tuberosity
-Bicipital aponeurosis which blends with the deep fascia of the forearm
What is the Bicipital aponeurosis?
Flat sheet like tendon from the biceps that forms the roof of the cuboidal fossa (blends with deep fascia of forearm)
What is the origin of the Biceps Brachialis?
Distal 2/3s of humerus
What is the insertion of the Biceps Brachialis?
Ulnar tuberosity
Where is the biceps Brachialis with respect to the biceps brachii?
Inferior to the biceps brachii
What is the origin and insertion of the Coracobrachialis?
Origin: Coracoid process of scapula
Insertion: Humerus (medial side of shaft
What is the motor function of the Coracobrachialis?
Adduction
Where is the origin and insertion of the short head of biceps?
Origin: Coracoid process of Scapula
Insertion: Radial tuberosity and Bicipital aponeurosis
What is the origin and insertion of the long head of biceps?
Origin: Supraglenoid tubercle
Insertion: Radial tuberosity and Bicipital aponeurosis
What is the motor function of the Long head of biceps and short head of biceps?
Flex arm at shoulder
Flex forearm
Supination
What is the origin and insertion of the Biceps Brachialis?
Origin: Distal 2/3s of humerus
Insertion: Ulnar tuberosity
What is the motor function of the Brachialis?
Flexor of forearm at elbow
(Ulnar is the hinge, it attaches to the ulnar tuberosity)
