A and P I Lab Muscles Function, Origin, and Insertion

What is the function of the orbicularis oculi?

Closes the eyes

What is the function of the orbicularis oris?

Closes the mouth

What is the function of the masseter?

closes the jaw

What is the function of the sternocleidomastoid? (2)

Flexes the neck forward and turns the head toward the opposite shoulder

What is the function of the pectorals major? (2)

adducts and rotates the arm medially

What is the function of the deltoid?

It abducts the arm

What is the function of the pectoralis minor

Moves the ribcage upward for inspiration.

What is the function of the external intercostals?

Elevates the ribcage for inspiration

What is the function of the internal intercostals

Depresses the rib cage for expiration

What is the function of the trapezius?

Extends the head

What is the function of the latissimus dorsi? (3)

extends, adducts, and medially rotates the arm

What is the function of the infraspinatous?

Lateral rotation of the humerus

What is the function of supraspinatus?

abduction of the humerus

What is the function of the elevator scapulae? (2)

Raises the scapula and flexes the neck to the same side

What is the function of the triceps brachii

Extends the forearm

What is the function the biceps brachii?

Flexes the elbow

What is the function the brachioradialis?

Flexes the forearm

What is the function of the Brachialis

Flexes the forearm

What is the function of the flexor pollicis longus?

flexes the thumb

WWhat is the function of the flexor digitorum profundus?

Flexes the distal phalanges and wrist

What is the function of the extensor digitorum?

extends the fingers and wrist

What is the function of the extensor pollicis longus?

Extends the thumb

What is the function of the iliopsoas?

Flexes the hip

What is the function of the gracilis? (3)

adducts the thigh, flexes and medially rotates the leg

What is the function of the sartorius? (2)

flexes and rotates the thigh laterally

What is the function of the fetus femoris? (2)

extends the knee and flexes the thigh

What is the function of the vastus laterallis?

extends the knee

What is the function of the vests mediallis?

Extends the knee

What is the function of the gluteus Maximus?

it is a powerful hip extensor

What is the function of the biceps femoris? (3)

extends and adducts thigh and flexes the knee

What is the function of the semitendinosus? (2)

it extends the thigh and flexes the knee

What is the function of the semimembranosus? (2)

It extends the thigh and flexes the knee

What is the function of the gastrocnemius?

it flexes the knee

What is the function of the flexor digitorium longus? (2)

flexes toes and plantar flexes the foot

What is the function of the flexor hallicus longus? (2)

Flexes big toe and plantarflexes foot

What is the function of the tibia's anterior?

Dorsiflexes the foot

What is the function of the extensor digitorium longus? (2)

extends the toes and dorsiflexes the foot

What is the function of the extensor hallucis longus? (2)

extends the big toe and dorsiflexes the foot

What is the origin and insertion of the Masseter?

Origin: Zygomatic arch and bone

Insertion: Angle and ramus of mandible

What is the origin and insertion of the sternocleidomastoid

Origin: Manubrium of sternum and medial clavicle

Insertion: Mastoid process of temporal bone and the occipital bone

What is the origin and insertion of the pectoralis major

Origin: Clavicle, sternum, cartilage of ribs 1-7, and the oblique muscle

Insertion: Intertubercular sulcus of humerus

What is the origin and insertion of the pectoralis minor?

Origin: anterior surface of ribs 3-5

Insertion: Coracoid process of scapula

What is the origin and insertion of the infraspinatus?

Origin: infraspinous fossa of the scapula

insertion: greater tubercle of the humerus

What is the origin and insertion of the supraspinatus

Origin: supraspinous fossa of Scapula

Insertion: greater tubercle of the Humerus

What is the origin and insertion of the rectus femoris?

Origin: Anterior inferior iliac spine and superior acetabulum

Insertion: tibial tuberosity and patella

What is the origin and insertion of the vastus lateralis?

Origin: Greater trochanter, intertrochanteric line and linea aspera

Insertion: tibial tuberosity and patella

What is the origin and insertion of the Vastus mediallis?

Origin: intertrochanteric line and linea aspera

Insertion: tibial tuberosity and patella

What is the origin and insertion of the Biceps Femoris?

Origin: Ischial tuberosity, linea aspera, and distal femur

Insertion: head of fibula and lateral condyle of the tibia

What is the origin and insertion of the Semitendinosus?

Origin: Ischial tuberosity

Insetion: Upper tibial shaft

What is the origin and insertion of the semimembranosus?

Origin: Ischial tuberosity

Insertion: Medial coldly of tibia and lateral condyle of the femur

What is the origin and insertion of the gastrocnemius?

Origin: Two heads from the medial and lateral condyles of the femur

Insertion: Calcaneus via the calcaneal tendon