Origin, Insertion, Function

Question 1

Rectus abdominis origin

Answer 1

At pubic crest & symphysis pubis

Question 2

Rectus abdominis insertion

Answer 2

At xiphoid process and inferior ribs.

Question 3

Rectus abdominis function

Answer 3

Flex the trunk, aids in expiration, defection, and childbirth.

Question 4

Pectoralis major origin

Answer 4

From clavicle, lower portion of sternum, coastal cartilage of the 1-6 ribs, and abdominal portion from external obliques.

Question 5

Pectoralis major insertion

Answer 5

2 heads unite within a common tendon and insert on the lateral lip of the intertubercular groove.

Question 6

Pectoralis major function

Answer 6

Allows internal rotation, adduction and flexion on arm.

Question 7

Rhomboid major origin

Answer 7

T2-T5 (thoracic vertebrae)

Question 8

Rhomboid major insertion

Answer 8

Lower medial border of scapula.

Question 9

Rhomboid major function

Answer 9

Assists the trapezius in downward rotation of scapula, in adduction or retraction.

Question 10

Gluteus Maximus origin

Answer 10

Along crest of ilium, sacrum and coccyx.

Question 11

Gluteus Maximus insertion

Answer 11

Attaches to the posterior aspect of the greater trochanter of the femur and the iliotibial tract.

Question 12

Gluteus Maximus function

Answer 12

Hip extension and external rotation.

Question 13

Tibialis anterior origin

Answer 13

Anterior shaft of tibia.

Question 14

Tibialis anterior insertion

Answer 14

Medial cuneiform and base of first metatarsal.

Question 15

Tibialis anterior function

Answer 15

Dorsiflexes ankle and inverts foot.

Question 16

Gastrocnemius origin

Answer 16

Lateral and medial condyles of femur.

Question 17

Gastrocnemius insertion

Answer 17

Heads attach to a common tendon, to form the calcaneal tendon which inserts at the calcaneus.

Question 18

Gastrocnemius function

Answer 18

Plantar flexes ankle, flexes knee.

Question 19

Biceps brachii origin

Answer 19

1) short head - tip of coracoid process.
2) long head - supraglenoid tubercle.

Question 20

Biceps brachii insertion

Answer 20

Attaches on the radius of a landmark - radial tuberosity.

Question 21

Biceps brachii function

Answer 21

Acts to flex the elbow, supination of forearm.

Question 22

Latissimus Dorsi origin

Answer 22

Along the lumbar and lower half of the thoracic vertebrae, and the iliac crest and sacrum below.

Question 23

Latissimus dorsi insertion

Answer 23

Inserts on the humerus on the floor of the intertubercular groove under Pectoralis majors muscle tendon.

Question 24

Latissimus dorsi function

Answer 24

Functions as an adductor, extensor and internal rotator of arm.

Question 25

Rectus femoris origin

Answer 25

Originates at the anterior inferior iliac spine.

Question 26

Rectus fermoris insertion

Answer 26

Join at the patellar tendon which wraps around the patella to a ligament and inserts on the tibial tuberosity of the tibia.

Question 27

Rectus femoris function

Answer 27

Knee extension and hip rotation.

Question 28

Biceps femoris origin

Answer 28

The ischial tuberosity. The linea aspera.

Question 29

Biceps femoris insertion

Answer 29

Fibres join and insert into head of fibula.

Question 30

Biceps femoris function

Answer 30

Extensor of hip, flexor of knee, externally rotates the flexed knee.