4B. Arm NB.pdf

Lecture: Arm Prof Nanette Briers [email protected] Room 4015, Level 4, Tygerberg Campus  Outcomes  Name and identify the different muscle groups. 2  Name and identify the different bones involved in the muscle groups.  Name and identify the joints in...

Lecture: Arm Prof Nanette Briers [email protected] Room 4015, Level 4, Tygerberg Campus  Outcomes  Name and identify the different muscle groups. 2  Name and identify the different bones involved in the muscle groups.  Name and identify the joints involved with the muscle groups.  Name and identify the origin and insertion of muscle groups  Name and identify the main function of the muscle groups and muscles  Name and identify the nerve supply of muscles.  Name and identify the structures (muscles, ligaments, nerves, blood vessels, etc) as described in the practical outcomes.  Describe the anatomy of the following clinically important areas:  axilla  cubital fossa  carpal tunnel  Write complete notes on the following nerve plexus:  brachial plexus 2 Arm - Overview 1 2 Our bones Nerves: 7 and muscles work Muscles that together. move the arm Osteology of are innervated Surface this region by nerves that anatomy emerge from the brachial plexus 3 Arterial 6 supply of the arm Name and identify and each of the forearm muscles in the 5 compartments. Describe the To ease the strain of 4 origin, insertion, memorization, the action, and muscles are divided into anatomical Venous innervation of drainage of these muscles groups in compartments of the the arm and arm and forearm forearm 3 Arm (from shoulder to elbow)  Bony elements  Humerus  Fascia  Muscles arm enveloped in a sleeve of deep fascia  Divides arm into ant. and post. Compartment  Med. and lat. intermuscular septa which pass from fascia to shaft of humerus and supraepicondylar ridges 4 Osteology 5 (Adapted from Gilroy et al. Atlas of Anatomy, Fig. 25.1) Osteology 6 (Adapted from Gilroy et al. Atlas of Anatomy, Fig. 25.1) Surface anatomy of arm 7  Muscles of arm: ant. / flexor compartment o M biceps brachii o Short & long head o Supinator of forearm, flexor in supinated position o M brachialis o Innervation: musculocutaneous n. o Flexor of forearm in all positions o Blood supply: muscular branches of o M coracobrachialis brachial artery o Flexor & add. of arm 8  (Adapted from Schuenke et al. Atlas of Anatomy: General Anatomy and Musculoskeletal System, pg. 270) 9 Muscles of anterior arm: Coracobrachialis m. 10 (Adapted from Schuenke et al. Atlas of Anatomy: General Anatomy and Musculoskeletal System, pg. 268 & 269) Muscles of the arm 11 (Adapted from Gilroy et al. Atlas of Anatomy, Fig. 25.18A) Muscles of arm (anterior superficial to deep) 14 (Adapted from Gilroy et al. Atlas of Anatomy, Fig. 25.19C & 25.19D) Muscles of arm: post. / extensor compartment o Attachments of: o M triceps brachii o Long, medial, & lat. head o Extensor of forearm o M anconeus (located chiefly in forearm) o Extensor of forearm o Innervation: radial n. o Blood supply: Muscular branches of profunda brachii a. 15 Muscles of posterior arm (sup to deep) 16 17 Muscles of posterior arm: triceps brachii and anconeus 18 Muscles of posterior arm: triceps brachii and anconeus 19 Arteries of the upper limb 20 (Adapted from Gilroy et al. Atlas of Anatomy, Fig. 28.1) Brachial artery  Brachial artery  Bifurcates at elbow joint.  Arterial supply in forearm:  radial artery  ulnar artery 21 (Adapted from Marieb et al. Human Anatomy, pg. 374, and 638) Veins of the upper limb 22 (Adapted from Marieb et al. Human Anatomy, pg. 648)