Origins and Insertions Questions And Answers Verified
100% Correct
Rectus Abdominis - ANSWER A: Flexion and lateral flexion of the trunk
Standing, anterior support to organs and lumbar
With Gluteus Maximus and hamstrings keeps pelvis from going into anterior tilt
O: Pubic crest and symphysis I:
Costal cartilage of 5-7 ribs
side of xiphoid process
Internal Intercostals - ANSWER A: Depresses the ribs during expiration
O: Rib below
I: Rib above
External Intercostals - ANSWER A: Elevate ribs during inspiration
O: Rib above
I: Rib below
Rhomboid Major - ANSWER A: Retracts and elevates scapula
Aids in rotating Glenoid cavity inferiorly
O: Spinous processes of T2-5
I: Medial border of scapula
Rhomboid Minor - ANSWER A: Retracts and elevates scapula
Aids in rotating scapula downward
O: Spinous processes of C7 and T1
I: Medial border of scapula
Trapezius (Upper Division) - ANSWER A: Elevates scapula
Rotates scapula for glenoid cavity to face superiorly
Retracts scapula
O: Occipital to spinous processes of C7
I: Clavicle and acromion process
Trapezius (Middle Division) - ANSWER A: Retracts and aids in elevation of scapula
O: Spinous processes of T1-5
I: Spine of scapula (superior)
Trapezius (Lower Division) - ANSWER A: Depresses and retracts scapula
, Rotates scapula upward for glenoid cavity to face superiorly
Inferior stabilization of scapula
Aids to maintain spine in extension
O: Spinous processes of T6-12
I: Spine of scapula (inferior)
Levator Scapulae - ANSWER A: Elevates scapula
Fotates scapula downward for glenoid cavity to face inferiorly.
Helps upper trap to elevate and retract scapula
O: Transverse processes C1-4
I: Top of vertebral border
Pronator Teres - ANSWER A: Pronation and flexion of forearm at elbow
O: Humerus and ulna
I: Radius
Anconeus - ANSWER A: Extension and pronation of forearm at elbow
O: Humerus
I: Lateral olecranon process
Brachioradialis - ANSWER A: Flexion of forearm at elbow
Pronates and Supinates to midposition
O: Humerus
I: Radius
Brachialis - ANSWER A: Flexes forearm at elbow
O: Anterior humerus
I: Ulnar tuberosity and coronoid process
Triceps Brachii - ANSWER A: Extends forearm at elbow
Aids in extension of arm at shoulder
O: Scapula
Lateral Humerus
Posterior Humerus
I: Olecranon process of ulna
Piriformis - ANSWER A: Rotates thigh
laterally abducts flexed thigh O: Anterior
surface of sacrum
I: Lateral Greater Trochanter
Gemellus Superior - ANSWER A: Rotates thigh laterally
Abducts flexed thigh