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Muscle Functions!
Includes the functions of the head, face, neck, torso, arm, and leg muscles!
| Question | Answer |
|---|---|
| Epicranius Frontalis | Pulling the scalp anteriorly, wrinkling of the forehead and elevation of the eyebrows |
| Epicranius Occipitalis | Raise your eyebrows, wrinkle your forehead, and bring your scalp backward |
| Orbicularis Oculi | Close the eyelids, and it also assists with tear drainage |
| Orbicularis Oris | Pulls the lip tissue centrally |
| Buccinator | Compresses the cheeks and expels air between the lips as in blowing a trumpet |
| Zygomaticus | Pulls the angle of the mouth superolaterally |
| Platysma | Pulling down the mandible, which opens the mouth, and pulling the corners of the lips out to the side and down, which forms a frown |
| Masseter | To elevate the jaw bone, bringing the teeth together in the chewing motion |
| Temporalis | Mastication, enabling jaw movement for chewing,biting, and grinding food |
| Sternocleidomastoid | Helps you bend your neck and turn/tilt your head |
| Splenius Capitis | Acts as an extensor and lateral flexor of the neck, and assists with its rotation |
| Trapezius | Helps you move your head, neck, and upper back, and maintain and adjust your posture. |
| Rhomboideus Major | Helps to hold the scapula (and thus the upper limb) onto the ribcage |
| Levator Scapulae | Works to elevate the scapula, but is also involved in rotating the scapula and tilting the head |
| Splenius Capitis | Acts as an extensor and lateral flexor of the neck, and assists with its rotation |
| Teres Major | Produces movements of the arm on the shoulder joint |
| Teres Minor | Produces external rotation of the shoulder joint |
| Latissimus Dorsi | Extend, abduct, and internally rotate the arm at the shoulder joint |
| Supraspinatus | Performs abduction of the arm, and pulls the head of the humerus medially towards the glenoid cavity |
| Infraspinatus | Assisting in external rotation of the shoulder joint, scaption, and lateral rotation of the humerus |
| Deltoid | Abduct the shoulder |
| Pectoralis Major | Flexion, adduction, and internal rotation of the humerus |
| External Oblique | Helps rotate the trunk (torso) |
| Rectus Abdominis | Move the body between the ribcage and the pelvis |
| Transversus Abdominis | Protects the internal organs by holding them in place |
| Serratus Anterior | Protraction and upward rotation of the scapulothoracic joint |
| Serratus Posterior | Facilitates the act of respiration |
| Pectoralis Minor | Stabilization, depression, abduction or protraction, internal rotation, and downward rotation of the scapula |
| Internal Oblique | Flex, laterally flex, and rotate the trunk |
| Biceps Brachii | Flexion and supination of the forearm |
| Triceps Brachii | Extension of the elbow joint |
| Brachialis | Serves as the major flexor of the elbow |
| Brachioradialis | Responsible for flexion of the forearm and functions to stabilize the elbow joint in conjunction with the biceps and brachialis muscle when flexing the forearm |
| Palmaris Longus | Wrist flexion and tensioning the palmar aponeurosis |
| Pronator Teres | Pronation of the forearm |
| Flexor Carpi Radialis | Flex the wrist and abduct the hand towards the thumb side |
| Extensor Carpi Radialis Longus | Produce wrist extension and abduction (radial deviation) |
| Flexor Carpi Ulnaris | Flexes the hand at the wrist |
| Extensor Carpi Ulnaris | Extend the wrist and adduct the hand at the wrist joint |
| Extensor Digitorum | Extend the fingers at the metacarpophalangeal joints |
| Flexor Digitorum | To bend the fingers by flexing the distal phalanges |
| Rectus Femoris | Extends the knee joint and assists in hip flexion |
| Vastus Medialis | Extend the knee joint and stabilize the patella by pulling it medially, ensuring proper tracking during movement |
| Vastus Lateralis | To extend the lower leg and allow the body to rise up from a squatting position |
| Sartorius | Flexes both the hip and knee joints, allowing for movements like bringing the leg forward while walking, and also contributes to external rotation of the hip and medial rotation of the knee when the knee is flexed |
| Psoas | To move the lower back, hips, and upper legs |
| Iliacus | Helps you bend, run, walk, sit, and maintain correct posture |
| Adductor Magnus | Adduct and medially rotate the thigh at hip joint |
| Gracilis | Assists with hip adduction, knee flexion, and knee internal rotation |
| Gluteus Maximus | Extend the hip joint |
| Gluteus Medius | Prime mover of abduction at the hip joint |
| Tensor Fasciae Latae | Produces the extension and lateral rotation of the leg on the knee joint, contributes to the movement of the thigh as well |
| Biceps Femoris | Movement at both the hip joint and knee joint |
| Semitendinosus | Extends the hip joint and flexes the knee joint |
| Semimembranosus | Flexes the knee joint, extends the hip joint, and medially rotates the tibia when the knee is flexed |
| Gastrocnemius | Produces flexion of the leg at the knee joint and plantar flexion of the foot at the talocrural joint |
| Soleus | To act as skeletal muscle |
| Tibialis Anterior | Dorsiflexes the foot at the talocrural joint and inverts it at the subtalar joint |
Created by:
AashrithaV22
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