Muscles Flashcards
Learn Muscles: Action Origin=immoveable point of attachment Insertion=moveable point of attachment
Sternocleidomastoid
A: head flexion & rotation
O: clavicle & manubrium
I: mastoid process of temporal bone
Orbicularis Oris
A: closes lips, kissing muscle
O: maxilla & mandile
I: lips
Orbicularis Occuli
A: closes & blinks eyes
O: medial margin of orbit
I: skin around eylids
Occipitalis
A: moves scalp posteriorly
O: occipital bone
I: galea aponeurotica
Masseter
A: elevates mandible
O: zygomatic arch
I: mandibular ramus
Frontalis
A: raises eyebrows
O: galea aponeurotica
I: eybrow skin
Rhomboid Major
A: adducts scapula
O: vertebral spinous processes
I: vertebral border of scapula
Serratus Anterior
A: protracts scapula
O: ribs
I: vertebral border of scapula
Trapezius
A: extends neck, elevates scapula
O: occipital bone & vertebral spinous processes
I: clavicle & scapula
External Intercostals
A: elevates ribs
O: inferior border of each rib
I: superior border of each rib
Internal Intercostals
A: depresses ribs
O: superior border of each rib
I: inferior border of each rib
Pectoralis Minor
A: protracts scapula
O: ribs
I: coracoid process of scapula
Pectoralis Major
A: arm flexion & adduction
O: ribs, sternum, & clavicle
I: greater tubercule of humerus
Temporalis
A: elevates mandible
O: temporal bone
I: coronoid process of mandible
Zygomaticus
A: elevates mouth, corners to smile
O: zygomatic bone
I: lateral sides of mouth
Sternohyoid
A: depresses larynx & hyoid bone
O: clavicle & manubrium
I: hyoid bone
Deltoid
A: arm abduction
O: clavicle and scapula
I: deltoid tuberosity of humerus
Latissimus Dorsi
A: arm extension and adduction
O: spinous processes of vertebrae
I: intertubercular gove of humerus
Supraspinatus
A: arm abduction
O: supraspinous fossa of scapula
I: greater tubercle of humerus
Infrapinatus
A: arm lateral rotation
O: infraspinous fossa of scapula
I: greater tubercle of humerus
Teres Minor
A: arm lateral rotation
O: lateral border of scapula
I: greater tubercle of humerus
Subscapularis
A: arm medial rotation
O: subscapular fossa of scapula
I: lesser tubercle of humerus
Teres Major
A: arm extension and adduction
O: scapula
I: intertubercular groove of humerus
Biceps Brachii
A: forearm flexion and supination
O: coracoid process of scapula
I: radial tuberosity
