1. Biology 160 Arm Muscles

2. Deltoid ORIGIN INSERTION Deltoid Tuberosity FUNCTION Abducts arm
Anterior – lateral 1/3 of the clavicle
Medial – Acromion process
Posterior – lower portion of the spine of the scapula
INSERTION
Deltoid Tuberosity
FUNCTION
Abducts arm
Flexes arm
Extends arm

3. Biceps Brachii ORIGIN Supraglenoid Tubercle of scapula
Coracoid process of scapula
INSERTION
Radial Tuberosity
FUNCTION
Flexes and supinates arm
Biceps Brachii

4. Brachialis ORIGIN Anterior Humerus INSERTION Coronoid process
Tuberosity of ulna
FUNCTION
Flexes elbow
Brachialis

5. Flexor Carpi Ulnaris ORIGIN Medial epicondyle of humerus INSERTION
Pisiform
hook of hamate
base of 5th metacarpal
FUNCTION
Flex and adduct wrist
Ulnar deviation
Flexor Carpi Ulnaris

6. Palmaris Longus ORIGIN Medial Epicondyle of humerus INSERTION
Palmar Aponeurosis
FUNCTION
Flex wrist
Palmaris Longus

7. Flexor Carpi Radialis ORIGIN medial epicondyle of humerus INSERTION
base of the 2nd and 3rd metacarpals
FUNCTION
Flexes and abducts wrist
Flexor Carpi Radialis

8. Flexor Digitorum Superficialis
ORIGIN
Medial epicondyle of the humerus
Shaft of the radius
INSERTION
Both sides of the middle phalynx of the fingers
FUNCTION
Flexes the fingers
Flexor Digitorum Superficialis

9. Special Notes
The common origin for the flexors of the wrist is the medial epicondyle of the humerus.
The Palmaris Longus is completely absent in about 8% of the population.

10. Brachioradialis ORIGIN Lateral epicondyle of the humerus INSERTION
Styloid process of the radius
FUNCTION
Flexes and supinates forearm
Brachioradialus

11. Pollicis Muscles (just know Function)
Adduct, flex, abduct, extend and oppose the thumb
Pollicus Muscles

12. Rotator Cuff Muscles Supraspinatus (GT) Infraspinatus (GT)
Subscapularis (LT)
Teres Minor (GT)
*** Special note that one function of all the rotator cuff muscles is shoulder stabilization.

13. Supraspinatus ORIGIN Supraspinous fossa of the scapula INSERTION
Greater Tuberosity of the humerus
FUNCTION
Abducts the arm
Supraspinatus

14. Infraspinatus ORIGIN Infraspinous fossa of the scapula INSERTION
Greater tuberosity of the humerus
FUNCTION
Lateral rotation of the humerus
Infraspinatus

15. Subscapularis ORIGIN Anterior surface of the scapula INSERTION
Lesser tuberosity of the humerus
FUNCTION
Medial rotation of the humerus
Subscapularis

16. Teres Minor ORIGIN Lateral border of the scapula INSERTION
Greater tuberosity of the humerus
FUNCTION
Lateral rotation of the humerus
Teres Minor

17. Teres Major ORIGIN Lateral border of the scapula INSERTION
Medial lip of the intertubercular groove of the humerus
FUNCTION
Extends, adducts and medially rotates the humerus “swimming motion”
Teres Major

18. Triceps Brachii ORIGIN Infraglenoid tubercle of the humerus
Lateral and medial surfaces of humerus
INSERTION
Olecranon process of the ulna
FUNCTION
Extends the elbow
Triceps Brachii

19. Extensor Carpi Radialis Longus
ORIGIN
Lateral epicondyle of the humerus
INSERTION
Base of the 2rd metacarpal
FUNCTION
Extends and abducts wrist
Radial deviation
Extensor Carpi Radialis Longus

20. Extensor Carpi Radialis Brevis
ORIGIN
Lateral epicondyle of the humerus
INSERTION
base of the 3rd metacarpal
FUNCTION
Extends and abducts wrist
Radial deviation
Extensor Carpi Radialis Brevis

21. Extensor Digitorum Communis
ORIGIN
Lateral epicondyle of the humerus
INSERTION
Posterior surfaces of fingers 2-5
FUNCTION
Extends fingers and wrist
Extensor Digitorum Communis

22. Extensor Carpi Ulnaris
ORIGIN
Lateral epicondyle of the humerus
INSERTION
Base of the 5th metacarpal
FUNCTION
Extends and adducts the wrist
Ulnar deviation
Extensor Carpi Ulnaris

23. Rhomboid Major ORIGIN Spinous process of T2 – T5 INSERTION
Medial border of the scapula
FUNCTION
Scapula retraction

24. Rhomboid Minor ORIGIN Spinous process of C7-T1 INSERTION
Medial border of the scapula
FUNCTION
Retracts the scapula

25. Biology 160 Muscles (Need to Know)
Due to the amount of information and the lack of study time the lab I have decided to eliminate some of the material for the lab final on muscles. Below is a list of the information that you will need to know.
****You will need to know the function and location for all the muscles in your lab book

26. Biology 160 Muscles (Need to Know) ARM LAB 1
You will need to know the origins, insertions and functions for these muscles
1,2,3,4,5,6,7,8,10,11,12,13,15,16
17,18,19,20 (Just the origin)

27. Biology 160 Muscles (Need to Know) Leg Lab 2
You will need to know the origins, insertions and functions for these muscles
1,2,4,5,6,7,8,9,11,12,17,18,19,20,21,22,
Psoas Major and Iliacus

28. Biology 160 Muscles (Need to Know) Torso Lab 3
You will need to know the origins, insertions and functions for these muscles
1,2,3,4,5,6,7,8, 9