Lab: Muscular System-Head, Neck, And Trunk Flashcards
Covers the dome of the skull; includes the galea aponeurotica, frontal belly, and occipital belly
Epicranius
Produces blinking, squinting; winking muscle
Orbicularis oculi
Opens lips
Levator labii superioris
Raises lateral corners of the mouth upward; smiling muscles
Zygomatic major and minor
Draws corner of lip laterally; tenses lips
Risorius
Closes mouth; kissing and whistling muscle
Orbicularis oris
Protrudes lower lip; V shaped muscle on chin
Mentalis
Holds food between teeth during chewing
Buccinator
Closes jaw and elevates mandible
Masseter
Closes jaw; elevates and retracts mandible
Temoralis
Sheetlike superficial neck muscle; role in facial expression
Platysma
Flexion of neck forward
Sternocleidomastoid
Large fan shaped muscle upper portion of chest
Pectoralis major
Fan shape muscle deep to scapula
Serratus anterior
Fleshy triangular shoulder muscle; injection site
Deltoid
Underneath pectoralis major
Pectoralis minor
11 pairs; aids in inspiration
External intercostals
11 pairs; aids in expiration
Internal intercostals
Prime mover of inspiration; forms floor of thoracic cavity
Diaphragm
Elevates scapula when shrugging shoulders
Trapezius
Brings arm down in power stroke
Latissimus dorsi
Stabilizes shoulder
Infraspinatus and supraspinatus
Bundle of nerve or muscle fibers bound together by connective tissue
Fascicle
Means straight
Rectus
Means triangle
Deltoid
Means Trapezoid- structure with 4 sides with 2 of them being parallel
Trapezius
Rough fibrous band of tissue
Aponeurosis
