Origin, Insertion, Function Flashcards
Rectus abdominis origin
At pubic crest & symphysis pubis
Rectus abdominis insertion
At xiphoid process and inferior ribs.
Rectus abdominis function
Flex the trunk, aids in expiration, defection, and childbirth.
Pectoralis major origin
From clavicle, lower portion of sternum, coastal cartilage of the 1-6 ribs, and abdominal portion from external obliques.
Pectoralis major insertion
2 heads unite within a common tendon and insert on the lateral lip of the intertubercular groove.
Pectoralis major function
Allows internal rotation, adduction and flexion on arm.
Rhomboid major origin
T2-T5 (thoracic vertebrae)
Rhomboid major insertion
Lower medial border of scapula.
Rhomboid major function
Assists the trapezius in downward rotation of scapula, in adduction or retraction.
Gluteus Maximus origin
Along crest of ilium, sacrum and coccyx.
Gluteus Maximus insertion
Attaches to the posterior aspect of the greater trochanter of the femur and the iliotibial tract.
Gluteus Maximus function
Hip extension and external rotation.
Tibialis anterior origin
Anterior shaft of tibia.
Tibialis anterior insertion
Medial cuneiform and base of first metatarsal.
Tibialis anterior function
Dorsiflexes ankle and inverts foot.
Gastrocnemius origin
Lateral and medial condyles of femur.
Gastrocnemius insertion
Heads attach to a common tendon, to form the calcaneal tendon which inserts at the calcaneus.
Gastrocnemius function
Plantar flexes ankle, flexes knee.
Biceps brachii origin
1) short head - tip of coracoid process.
2) long head - supraglenoid tubercle.
Biceps brachii insertion
Attaches on the radius of a landmark - radial tuberosity.
Biceps brachii function
Acts to flex the elbow, supination of forearm.
Latissimus Dorsi origin
Along the lumbar and lower half of the thoracic vertebrae, and the iliac crest and sacrum below.
Latissimus dorsi insertion
Inserts on the humerus on the floor of the intertubercular groove under Pectoralis majors muscle tendon.
Latissimus dorsi function
Functions as an adductor, extensor and internal rotator of arm.
Rectus femoris origin
Originates at the anterior inferior iliac spine.
Rectus fermoris insertion
Join at the patellar tendon which wraps around the patella to a ligament and inserts on the tibial tuberosity of the tibia.
Rectus femoris function
Knee extension and hip rotation.
Biceps femoris origin
The ischial tuberosity. The linea aspera.
Biceps femoris insertion
Fibres join and insert into head of fibula.
Biceps femoris function
Extensor of hip, flexor of knee, externally rotates the flexed knee.
