L4 - Upper Muscles (Innervations, Origins, and Insertions) Flashcards
What structure innervates the upper limb?
The brachial plexus
What nerve innervates the anterior upper arm?
The musculocutaneous nerve
What nerve innervates the anterior forearm and thenar region?
The median nerve
What nerve innervates the hypothenar region of the hand?
The ulnar nerve
What nerve innervates the posterior upper arm and posterior forearm?
The radial nerve
What nerve innervates the shoulder?
The axillary nerve
O&I: Massester
Origin: zygomatic arch and maxilla
Insertion: coronoid process and ramus of mandible
O&I: Sternocleidomastoid
Origin: Sternum and clavicle
Insertion: mastoid process
O&I: Trapezius
Origin: External occipital protuberance, superior nuchal line, spinous processes C7-T12
Insertion: clavicle, acromion process, spine of scapula
O&I: Deltoid
Origin: clavicle, acromion process, spine of scapula
Insertion: deltoid tuberosity
O&I: Biceps brachii
Origin: supraglenoid tubercle and coracoid process
Insertion: radial tuberosity
O&I: Triceps brachii
Origin: infraglenoid tubercle, posterior shaft of humerus
Insertion: olecranon process
O&I: Extensor digitorum
Origin: lateral epicondyle of humerus
Insertion: digits 2-5
O&I: Flexor digitorum superficialis
Origin: medial epicondyle of the humerus
Insertion: digits 2-5
O&I: Opponens pollicis
Origin: trapezium
Insertion: 1st metacarpal
