Muscular System Flashcards
(25 cards)
Draws corner of mouth
posteriorly; compresses cheek to hold food between teeth
Buccinator
Lowers corner of mouth; “frown”
Depressor anguli oris
Raises upper lip; sneer
Levator labii superioris
Moves scalp; raises eyebrows
Occipitofrontalis
Closes eyes; blinking, winking, squinting
Orbicularis oculi
Closes and purses lips; “kissing”
Orbicularis oris
Elevates and abducts upper lip and corner of mouth; “smile”
Zygomaticus major
Elevates and abducts upper lip; “smile”
Zygomaticus minor
Elevates and draws mandible posteriorly; closes jaw
Temporalis
Elevates and pushes mandible anteriorly; closes jaw
Masseter
Pushes mandible anteriorly
and depresses mandible; closes jaw
Lateral pterygoid
Pushes mandible anteriorly and elevates mandible; closes jaw
Medial pterygoid
Flexes vertebral column;
compresses abdomen
Rectus abdominis
Compresses abdomen; flexes and rotates vertebral column
External abdominal oblique
Compresses abdomen; flexes and rotates vertebral column
Internal abdominal oblique
Compresses abdomen
Transversus abdominis
Elevates, depresses, retracts, rotates, and fixes scapula; extends neck
Trapezius
Flexes and extends shoulder; abducts and
medially and laterally rotates arm
Deltoid
Extends shoulder; adducts and medially rotates arm
Latissimus dorsi
Flexes shoulder; extends shoulder from flexed position; adducts and medially rotates arm
Pectoralis major
the ability of muscle to shorten forcefully, or contract
Contractility
the capacity of muscle to respond to a stimulus
Excitability
muscle can be stretched beyond its normal resting length and still be able to contract
Extensibility
the ability of muscle to recoil to its original resting length after it has been stretched
Elasticity
