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Muscular System - Anatomy & Physiology

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Terms in this set (29)

  • Common origin of muscles of facial expression
    Surface of the skull
  • Common insertion of muscles of facial expression
    Dermis of the skin
  • Action of occipitofrontalis muscle
    Raises eyebrows; wrinkles forehead
  • Origin and insertion of orbicularis oris
    Origin: Medial wall of orbit; Insertion: Skin around eyelids
  • Definition of mastication
    Act of chewing food
  • Prime movers for mandible elevation
    Temporalis, masseter, medial pterygoid
  • Prime movers for mandible depression
    Lateral pterygoid, geniohyoid, mylohyoid, digastric
  • Action of sternocleidomastoid muscle
    Flexes neck
  • Prime mover for neck flexion
    Sternocleidomastoid
  • Muscles that elevate ribs during inhalation
    External intercostals and scalenes
  • Muscle that compresses abdomen and flexes spine
    Rectus abdominis
  • Origin of trapezius muscle
    Occipital bone; spinous processes of thoracic vertebrae
  • Insertion of pectoralis minor
    Coracoid process of scapula
  • Action of deltoid muscle
    Abduction, flexion, and extension of arm
  • Origin of biceps brachii
    Coracoid process of scapula
  • Action of triceps brachii
    Extension of elbow
  • Origin of flexor carpi radialis
    Medial epicondyle of humerus
  • Action of gluteus maximus
    External and lateral rotation of thigh
  • Muscles that extend the knee
    Rectus femoris, vastus lateralis, vastus medialis, vastus intermedius
  • Origin of gastrocnemius
    Medial and lateral epicondyles of femur
  • Action of tibialis anterior
    Dorsiflexion and inversion of foot
  • Muscles that flex the elbow
    Brachialis, biceps brachii, brachioradialis
  • Muscles that abduct the shoulder
    Supraspinatus and deltoid
  • Muscles that flex the hip
    Iliopsoas, iliacus, and psoas major
  • Muscles that extend the hip
    Gluteus maximus, biceps femoris, semimembranosus, semitendinosus, adductor magnus
  • Muscle that compresses cheeks (whistling)
    Buccinator
  • Muscle that abducts scapula and rotates it upward
    Serratus anterior (boxer's muscle)
  • Muscle that flexes, abducts, and laterally rotates thigh
    Sartorius
  • Muscle that supinates the elbow
    Supinator and biceps brachii