Lab Muscles Flashcards
Romboid minor
O: spinous process of C7 and T1
I: Medial border of scapula at base of spine
A: adducts scapula
Serratus Anterior
O: Lateral surface of upper 8 ribs
I:Anterior lip of medial border of scaula
A: protracts in stabilizing the scapula
Sternohyoid
O: Posterior surface of manubrium I: Hyoid Bone A; Depresses hyoid bone
Omohyoid - Superios and Inferior belly
O: Superior border of scapular near scapular notch I: Hyoid bone A: Depresses hyoid bone
Deltoid
O:spine of scapula I:Deltoid tuberosity A: Abducts humerus
Teres major
O:Lateral border at inferior angle of scapula; A:Medial lip of intertubercular groove of humerus; A:medially rotates humerus
Brachialis
O:Anterior distal two-thirds of humerus; I: Coronoid process of ulna; A:Flexes ulna.
Occipitalis
O: Occipital and temporal bones I: Epicranial aponeurosis A: Fixes epicranial aponeurosis
Zygomaticus major
O: Zygomatic Arch I: Superlateral angle of mouth (above corner of mouth) A: Elevates corners of mouth
Digastric (anterior and posterior belly)
O: Anterior - Lower border of mandible near midline Posterior belly - Mastoid notch of temporal bone
Triceps brachii
O: Infraglenoid tubercle I: Olecranon process of ulna A: Extends humerus and Ulna
Massester
O: Zygomatic Arch (and process) I: Ramus of the mandible A: Elevates Mandible
Biceps brachii
O: Supraglenoid tubercle I: Radial tuberosity of radius A: Flexes radius and humerus
Infraspinatus
O: Infraspinous fossa; I: Greater tubercle of humerus; A: rotates humerus laterally.
Supraspinatus
O: Supraspinous fossa; I: Greater tubercle of humerous; A: Abducts humerus
Pectoralis Minor
O: Anterior surface of ribs 3-5
I: Coracoid process of scapula
A: Draw the scapular down and forward
Errector Spinae
O: Sacrum
I: Angles of ribs
A: Externsion of vertebral column
Frontalis
O: Epicranial aponeurosis I: Skin over eyebrow A: Elevates Eyebrows
Teres minor
O:Lateral border of scapula; I:Greater tubercle; A:Laterally rotates humerus.
Pectoralis Major
O: Sternum
I: Lateral lip of intertubercular Groove of humerous
A: Adducts humerus
Internal abdominal oblique
O:Iliac crest I:Linea alba; A:Compresses abdomen.
Sternocleidomastoid
O: Manubrium I: Mastoid process A: Biltateral action flexes neck
Levator Scapulae
O: Transverse process of C1-C4
I: medial border of scaula near superior angle
A: Elevates the scapula
External Intercostal
O: Inferior border of rib above
I: Superior border of rib below
A: elevates ribcage during inspiration
External abdominal oblique
O: External surface of lower 8 ribs; I: Linea alba; A:compresses abdomen.
Latissimus Dorsi
O: Thoracolumbar fascia
I: Intertubercular Groove of Humerus
A: Adduct Humerus
Orbicularis oris
O: Corner of mouth (Modiolus) I: Muscles interlace to surround mouth A: Purses Lips
Temporalis
O: Temporal Fossa I: Coronoid process of the mandible A: elevates mandible
Rectus abdominis
O:Pubic symphysis; I:Xiphoid process; A: Flexes vertebral column.
Subscapularis
O:Subscapular fossa; I:Lesser tubercle of humerus; A: rotates humerus medially.
Transverse abdominis
O: Anterior iliac crest I:Linea alba; A: Compresses abdomen.
Internal Intercostal
O: Superior border of lower rib
I: Inferior border of upper rib
A: Depresses rib cage during expiration
Rhomboid Major
O: spinous process of T1-T5
I: Medial border of scapula below base of spin
A: adducts the scapula
Risorius
O: Fascia of master I: corner of mouth (Modiolus) A: Draws corner of mouth laterally
Coracobrachialis
O: coracoid process of the scapula supraglenoid tubercle I: Middle third of humerus Action: Flexes humerus
Orbicularis occuli
O: Medial orbital margin I: Skin surrounding eye A: Closes eyelids
Trapezius
O: Superior Nuchal Line I: Acromion process A: elevates scapula
