Sci Quiz PDF

C. Muscles of Facial Expression Muscle Primary Action(s): Name: Frontalis Raises eyebrows Temporalis Closes jaw (antagonistic muscles); allows mastication (chewing) Orbicularis Blinks & Closes eye oculi Masseter Closes jaw (antagonistic muscles); allows...

C. Muscles of Facial Expression Muscle Primary Action(s): Name: Frontalis Raises eyebrows Temporalis Closes jaw (antagonistic muscles); allows mastication (chewing) Orbicularis Blinks & Closes eye oculi Masseter Closes jaw (antagonistic muscles); allows mastication (chewing) Orbicularis Closes/protrudes lips oris Zygomaticu Raises corners of mouth s Platysma Pulls corners of mouth inferiorly D. Muscles That Move the Head Muscle Name: Primary Action(s):  Primary Action(s): Flexes neck; rotates Sternocleidomas head toid Primary Action(s): Bilateral contraction, Splenius capitis. unilateral contraction Semispinalis capitis E. Muscles That Move the Pectoral Girdle Muscle Name: Primary Action(s): Trapezius Actions: - Elevating, retracting, and rotating the scapula - Extending and laterally flexing the head and neck - Maintaining and adjusting posture - Canl be both an antagonist and synergist, depending on the movement / Adductor (scapula retraction) EX: Shoulder shrugs - Elevating the shoulders in a shrugging motion Pectoralis minor; Serratus Pectoralis minor anterior Actions: - Protracting the scapula - Downwardly rotating the scapula - Depressing the scapula - Synergist / Abductor (scapula protraction) Serratus anterior Actions: - Upwardly rotates the scapula - Stabilizes the scapula against the ribcage - Synergist / Abductor (scapula protraction) EX (Pectoralis minor + Serratus anterior): Chest dips - Depressing and protracting your scapula as you lower your body, while the arms extend and flex during the dip Rhomboideus Actions: major - Retracting and elevating the scapula - Rotating the scapula downward - Retracting the pectoral girdle - Stabilizing the scapula - Antagonist / Adductor (scapula retraction) EX: Face pulls - Retracting the scapula, directly targets the rhomboid major during the pulling motion Levator Actions: scapulae - Elevating the scapulae - Rotating the glenoid cavity (the depression in the scapula that forms the shoulder joint with the humerus) downward - Extending and flexing the neck EX: Shoulder shrugs - Elevating the scapula; primarily targets the trapezius but also  activates the levator scapulae F. Muscles That Move the Arm Muscle Name: Primary Action(s): Pectoralis Medially rotates arm; adductor major Teres major Extends/adducts humerus, rotates arm medially Teres minor; Rotates arm laterally; abductor Infraspinatus Latissimus Extends and adducts arm; dorsi rotates the humerus inwardly; pulls shoulder downward and posteriorly; adductor and extensor Deltoid; Abduction of arm; flexes/extends Supraspinatus the humerus; abductor G. Muscles That Move the Forearm Muscle Primary Action(s): Name: Biceps Prime mover for forearm brachii flexion/movement for elbow Brachialis; Synergist with biceps brachii to flex and move Brachioradial the forearm is Triceps Extends elbow brachii Supinator Rotates the radius laterally at the proximal radioulnar joint Pronators Rotational movement of the forearm that results in the palm facing posteriorly H. Muscles That Move the Wrist, Hand & Fingers Muscle Name: Primary Action(s): *Flexors: (Summarize for whole muscle group) -carpi radialis 1. Carpi radialis: -carpi ulnaris Flexes wrist and abducts -digitorum hand 2.Carpi Ulnaris: Flexes wrist and abducts hand. 3.Digitorum: Flexes wrist & fingers. *Extensors: (Summarize for whole muscle group) -carpi radialis longus, brevis - carpi ulnaris 1. Carpi radialis: -digitorum Extend wrist and abducts hand 2.Carpi Ulnaris: Extends the hand at the wrist and abducts the hand 3.Digitorum: Extends the wrist and fingers I. Muscles of the Abdominal Wall Muscle Primary Action(s): Name: Allows for the Rectus movement of the body abdominis between the rib cage and pelvis in a curling motion (move up n down) Allows us to keep the upper body in an upright posture  Lateral flexion of the External trunk oblique Flexion of the trunk Internal Lateral flexion of the oblique trunk Compresses the Transvers abdomen e abdominis J. Muscles That Move the Thigh - Anterior & Posterior Muscle Primary Action(s): Name: Psoas major; Flexation, rotation of Iliacus thigh, hip  Simultaneous contraction of the psoas major and a powerful flexion of the thigh at the hip joint Gluteus Prime mover/agonist extends maximus hips (when forceful extension is required) Gluteus Abduct thigh, steadies pelvis medius; during walking Gluteus · Work as an abductor as it minimus moves the leg away from the midline Tensor fasciae assisting in knee flexion latae and lateral rotation through the attachment of the IT band to the tibia. Assist with hip abduction, Gracilis knee flexion, internal rotation Adductor longus; abudct thigh Adductor magnus K. Muscles That Move the Leg Muscle Name: Primary Action(s): Flexes the leg at the Sartorius knee Flexes the thigh on hip Abducts the thigh Laterally rotates the thigh Medially rotates the leg *Quadriceps (Summarize for whole muscle group: group) -Rectus femoris All- extends the leg at the knee -Vastus lateralis Rectus femoris extends the -Vastus leg at knee and flexes the medialis thighs at hips -Vastus intermedius *Hamstrings (Summarize for whole muscle group: group) -Biceps femoris -Semitendinosu Biceps femoris- contributes to s the knee’s flexion (flexes the leg at the knee), lateral -Semimembran rotation of the lower leg, and osus extends the thigh at the hip Semitendinosus- key roles in activities like walking, running, bending the knee (flexes the leg at the knee), and extending the thigh at the hip Semimembranosus- knee flexion, hip extension, and medial rotation of the tibia L. Muscles That Move the Ankle, Foot, and Toes Muscle Primary Action(s): Name: Tibialis Moves the foot up anterior and down Fibularis Moves the foot longus side to side Gastrocnemi Plantar flexes foot us and flexes knee Soleus Plantar flexes your foot