Anatomy Lab 2 Exam
t Actions * Flexion: decrease in joint angle from anatomical postion (bend elbow, flexing forearm) * Extension: return to anatomical position from flexion * Abduction: away from body * Adduction: return of body to anatomical position * Rotation: circular * Lateral: anterior surface to lateral side * Medial: anterior surface to medial side * Circumduction: conical shape * Protraction: horizontal movement in anterior direction (jaw forward) * Retraction: reverse of protraction. * Elevation: move in superior direction. Upward. (shrug shoulder) * Depression: inferior direction. Down. * Inversion/Supination: soles medially, facing each other * Eversion/Pronation: soles laterally, away from each other Region: Shoulder (Superficial) | Name of Muscle | Origin | Insertion | Action | | Trapezius | -Posterior occipital bone-ligamentul nuchae-C7-T12 | -Clavicle-acromion process-spine of scapula | -head extension/abduction-scapula rotation/adduction-fix scapula | POSTERIORDiamond shape | Upper | Occupital boneCervical spine | -clavicle-acromium process | -elevation-upward rotation | | Middle | Thoracic spine | Spine of scapula | Retraction | Runs horizontally | Lower | Lower thoracic spine | Base of spine of scapula | -depression-upward rotation | -runs upward | DeltoidShoulder. | -clavicle-acromion process-spine of scapula | -deltoid tuberosity of humerus | -arm abduction-flexion-extension-medial/ lateral rotation | LATERAL. Top of shouldersDelta triangle | Anterior | Clavicle | Deltoid tuberosity | FlexionHorizontal adduction | | Middle | Acrominum process | - Deltoid tuberosity | Abduction | | Posterior | Spine and scapula | Deltoid tuberosity | ExtensionHorizontal abduction | | Pectoralis MajorChest. 0 | -Clavicle-sternum-Cartilage of ribs 1-7 | -crest of greater tubercle of humerus | Arm-flexion-horizontal adduction-regular adduction-medial rotation-extension from flexion |