OIA/Innervation: Upper Limb and Face Muscles Flashcards
OIA: Triceps Brachii
O: infraglenoid tubercle, posterior shaft of humerus
I: olecranon process
A: extends elbow and shoulder
OIA: Trapezius
O: external occipital protuberance, superior nuchal line, spinous processes of C7-T12
I: clavicle, acromion process, spine of scapula
A: rotates, retracts, elevates, and depresses scapula; extends neck
OIA: Flexor Digitorum Superficialis
O: medial epicondyle of humerus
I: digits 2-5
A: flexes digits 2-5
Innervation: Ulnar Nerve
hand (except thenar region)
Innervation: Brachial Plexus
upper limb
OIA: Extensor Digitorum
O: lateral epicondyle of humerus
I: digits 2-5
A: extends digits 2-5
Innervation: Axillary Nerve
shoulder (deltoid and teres minor)
OIA: Masseter
O: zygomatic arch and maxilla
I: coronoid process and ramus of mandible
A: elevates and protracts mandible
OIA: Biceps Brachii
O: supraglenoid tubercle, coracoid process
I: radial tuberosity
A: flexes elbow and shoulder, supinates forearm
OIA: Opponens Pollicis
O: trapezium
I: 1st metacarpal
A: opposition of the thumb
OIA: Sternocleidomastoid
O: sternum and clavicle
I: mastoid process
A: rotates head, flexes neck
Innervation: Musculocutaneous Nerve
anterior upper arm
OIA: Deltoid
O: clavicle, acromion process, spine of scapula
I: deltoid tuberosity
A: flexes, extends, and abducts shoulder joint
Innervation: Radial Nerve
posterior upper arm and posterior forearm
Innervation: Median Nerve
anterior forearm and thenar region
