UE Muscle Actions Flashcards
Masseter
TMJ elevation, protrusion, retrusion, side to side
Temporalis
TMJ elevation, depression, retrusion, side to side
Suprahyoid and infrahyoid
TMJ depression
Medial pterygoid
TMJ elevation, protrusion, side to side
Lateral pterygoid
TMJ protrusion, side to side, depression
Digastric
TMJ retrusion
Sternocleidomastoid
Contralateral rotation, ipsilateral side bending, flexion
Longus colli
Neck flexion
Scalenus
Neck flexion, rotation/side bending
Multifidus
Cervical extension, cervical rotation & side bending, thoracolumbar extension and rotation and side bending
Splenius cervicis, semispinalis cervicis, iliocostalis cervicis, longissimus cervicis
Cervical extension, rotation, lateral bending - semispinalis cervicis does not rotate or side bend
Rectus abdominus
Thoracolumbar flexion
Internal/external obliques
Thoracolumbar flexion, rotation, side bending
Erector spinae
Thoracolumbar extension
Quadratus lumborum
Thoracolumbar extension, rotation, and side bending
Longissimus and iliocostalis thoracis
Thoracic rotation and side bending
Rotatores
Thoracolumbar rotation and side bending
Upper trapezius
Scapular elevation, upward rotation, neck extension
Middle trapezius
Scapular Retraction
Lower trapezius
Scapular depression, upward rotation
Levator scapulae
Scapular elevation, cervical side bending
Serratus anterior
Scapular protraction, upward rotation
Pectoralis major
Scapular depression, shoulder adduction, shoulder flexion (clavicular head), shoulder internal/medial rotation, horizontal adduction