Presentation is loading. Please wait.

Presentation is loading. Please wait.

Muscles of the Forearm Dr. Sama ul Haque.

Similar presentations


Presentation on theme: "Muscles of the Forearm Dr. Sama ul Haque."— Presentation transcript:

1 Muscles of the Forearm Dr. Sama ul Haque

2 Objectives Identify the muscles in the anterior and posterior compartments of the forearm in terms of their origin, insertion, nerve supply and actions. Know the neurovascular structures in the anterior and posterior compartments of the forearm. Discuss the functions of the muscles in the anterior and posterior compartment of the forearm.

3 Functional organization of Anterior and posterior Compartments of forearm.

4 Names of the Muscles of forearm
Long names: good guide to location and function Location: ie. superficial / deep radial / ulnar Function: ie. flexor / extensor adductor / abductor Does it act on the thumb (pollux) or the fingers (digits)?

5 Functional Organization
Anterior compartment – flexor / pronator Posterior Compartment – extensor / supinator Flex the wrist ………[flexor] Extend the wrist ……..[extensor] Pronate the forearm ……..[pronator] Acting on wrist (carpus) only ……[carpi] Acting on fingers ……..[digiti / digitorum] Acting on thumb (pollux) ……[pollicus]

6 Flexion / Extension at the wrist joint.

7 Adduction / abduction at the wrist joint.

8 X X Movements of fingers. Metacarpophalangeal (condyloid joints):
flexion / extension and abduction / adduction Interphalangeal (hinge joints): flexion / extension X X

9 Movements of the thumb – a specialized digit, occur at
right angles to the fingers. Mainly at the Carpometacarpal (saddle) joint. MCP – condyloid; IP – hinge (like fingers).

10 Radius and Ulna

11 Radius and Ulna (Pronated)

12 Muscles of the anterior compartment of forearm

13 Muscles of the anterior compartment of forearm

14 Anterior Compartment of forearm
Pronator teres Superficial: Common flexor origin Pronator Teres Flexor Carpi Radialis Palmaris Longus Flexor Digitorum Superficialis, Flexor Carpi Ulnaris Brachioradialis flexor carpi radialis Palmaris longus flexor digitorum superficialis flexor carpi ulnaris

15 Functional organization: Only flex at the wrist. Flexor carpi radialis
Anterior Compartment of forearm Functional organization: Only flex at the wrist. Flexor carpi radialis Palmaris longus Flexor carpi ulnaris Flexor Carpi Radialis Palmaris Longus Flexor Carpi ulnaris

16 Anterior Compartment of forearm

17 Deep Dissection Forearm (Anterior)

18 Neurovasculature of Anterior Compartment of forearm

19 Muscles of the posterior compartment of forearm

20 Muscles of the posterior compartment of forearm

21 Muscles of the posterior compartment of forearm

22 Muscles of Forearm

23 Muscles of the Forearm (Post. View)
Anconeus

24 Posterior Forearm (Superficial dissection)
Nerve Supply Radial Nerve Anatomical snuff box

25 Functional Organization:
Deep Posterior Compartment Abductor Pollicis Longus Extensor Pollicis Brevis Extensor Pollicis Longus Extensor Indicis Supinator Functional Organization: Extend Hand At Wrist Extend / Abduct Thumb Extend Index Finger Supinate abductor polliucis longus extensor pollicis brevis extensor pollicis longus extensor indicis

26 Deep Dissection Forearm (Posterior)

27 Superior and Inferior radioulnar Joints
Superior radioulnar Joint: Head of radius articulates with radial notch of ulna Type: Pivot joint). It is held in place by the annular ligament. Radio-ulnar articulation is stabilized by interosseous membrane. Inferior radioulnar Joint:

28 Supination and Pronation

29

30 Course of radial and ulnar arteries in forearm

31 Neurovasculature (deep). Lateral: radial artery radial nerve Midline:
median nerve anterior interosseus a. anterior interosseus n. (deep branch of median) Medial: ulnar artery (gives off common interosseus artery divides into anterior and posterior branches) ulner nerve radial n ulnar a radial a. ulnar n median n anterior interosseus a + n

32 Radial nerve and its branches supply
Neurovasculature. Radial nerve and its branches supply all muscles in posterior compartment, including Brachioradialis (!). - superficial radial nerve - deep radial nerve - posterior interosseous nerve. Posterior interosseous artery runs between superficial and deep muscles Brachioradialis Deep branch posterior interosseus branch Superficial branch

33 Radial & Ulnar Arteries
lateral medial Radial artery Ulnar artery Common interosseous Anterior Posterior Dorsal and palmer carpal branches Dorsal and palmer carpal branches Deep (superficial) palmar arches superficial (deep)palmar arches

34 RELATION OF ARTERIES, NERVES AND TENDONS AT THE WRIST NANAN
Superficial Radial Nerve Radial Artery Median Nerve Ulnar Artery Ulnar Nerve MOVING LATERAL TO MEDIAL 1-9 Brachioradialis Superficial Radial n. Radial Artery Flexor Carpi Radialis 5. Median Nerve Flexor Digitorum Superficialis Ulnar Artery Ulnar Nerve 9. Flexor Carpi Ulnaris Pulanous Longous Thumb

35 Thank you


Download ppt "Muscles of the Forearm Dr. Sama ul Haque."

Similar presentations


Ads by Google