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Nerves. Brachial Plexus Roots C5 C6 C7 C8 T1 Brachial Plexus Trunks Upper Trunk Middle Trunk Lower Trunk C5 C6 C7 C8 T1.

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Presentation on theme: "Nerves. Brachial Plexus Roots C5 C6 C7 C8 T1 Brachial Plexus Trunks Upper Trunk Middle Trunk Lower Trunk C5 C6 C7 C8 T1."— Presentation transcript:

1 Nerves

2 Brachial Plexus Roots C5 C6 C7 C8 T1

3 Brachial Plexus Trunks Upper Trunk Middle Trunk Lower Trunk C5 C6 C7 C8 T1

4 Brachial Plexus Divisions Eash trunk gives anterior and posterior divisions (behind middle ⅓ of the clavicle ) C5 C6 C7 C8 T1

5 Brachial Plexus Cords C5 C6 C7 C8 T1 Posterior Cord

6 Brachial Plexus Cords C5 C6 C7 C8 T1 Posterior Cord Medial Cord

7 Brachial Plexus Cords C5 C6 C7 C8 T1 Posterior Cord Medial Cord Lateral Cord

8 Brachial Plexus Lateral Cord Branches Lateral pectoral Musculocutaneous Lateral root of Median n.

9 Medial Cord Branches Medial Root of Median Medial Pectoral Medial Cutaneous n. of Forearm Ulnar

10 Posterior Cord Branches Upper Subscapular Lower Subscapular Axillary N. To Latissimus Dorsi Radial

11 Upper Trunk Branches Suprascapular Nerve to Subclavius

12 Roots Branches C5 C6 C7 C8 T1 N. to Serratus Anterior Root of Phrenic N. To Rhomboids

13 Brachial Plexus Injuries 1.Complete Injury

14 Brachial Plexus Injuries 2.Erb’s Injury

15 Brachial Plexus Injuries 3.Klumpke’s Injury

16 Musculocutaneous Nerve Mixed nerve from the lateral cord Course : Lareral: the 3rd part of Axillary artery Leaves the axilla by piercing the coracobrachialis m. Then descends downwards between biceps and brachialis. Finally continues as lateral cutaneous nerve of the forearm Branches: Coracobrachialis, Biceps & Brachialis

17 Radial Nerve C5,6,7,8,T1 Course & Relations: Arm Lies behind the upper part of the brachial artery between it & the 2 heads of triceps long head of Triceps Brachial artery

18 Radial Nerve C5,6,7,8,T1 Course & Relations: Arm After leaving the spiral groove: The nerve pierces the lateral intermuscular septum to enter the anterior compartment on the lateral side of the arm

19 Radial Nerve C5,6,7,8,T1 Course & Relations: Forearm In front of the lateral epicondyle it gives the posterior interosseous & continues downwards as the superficial radial nerve. Supinator

20 Radial Nerve C5,6,7,8,T1 Course & Relations: Forearm Nerve winds around the lateral side of the radius to reach the back of the hand cross over the anatomical snuff box

21 Median Nerve Formed by: branches from medial & lateral cords (C6, 7, 8 & T1) Crosses the brachial artery Brachial artery

22 Median Nerve Lies medial to biceps, Course Biceps Median nerve Ulnar nerve

23 Median Nerve Lies medial to biceps, anterior to brachialis & triceps Course Brachialis Median nerve Ulnar nerve Triceps Triceps In the arm: gives no branches

24 Median Nerve Course Passes bet 2 heads of pronator teres deep to flexor digitorum superficialis deep to flexor retinaculum Between Flexor Pollicis Longus & Flexor Digitorum Superficialis Lies on Flexor Digitorum Profundu

25 Median Nerve Branches Supplies flexors of the forearm Except Flexor Carpi- Ulnaris Medial ½ Flexor Digitorum Profundus

26 Flexor Pollicis Brevis Abductor Pollicis Brevis Median Nerve Branches Opponens Pollicis All Thenar Ms. Except Adductor Pollicis 1 st & 2 nd Lumbricals

27 Median Nerve Branches Palmar Cutaneous Nerve of Palm

28 Median Nerve Branches Palmar surface of lateral 3 ½ digits

29 Median Nerve Injury Ape Hand Deformity

30 Ulnar Nerve Terminal branch of the medial cord of the brachial plexus

31 Ulnar Nerve Passes through posterior compartment of the arm (behind the medial epicondyle ) Ulnar nerve Median nerve NO BRANCHES IN ARM

32 Ulnar Nerve Enters between the heads of flexor carpi ulnaris Flexor Digitorum Profundus Flexor Carpi ulnaris

33 In the Forearm Supplies: Medial ½ Flexor Digitorum Profundus Flexor Carpi ulnaris

34 Ends by dividing into: 1. Superficial Branch Superficial Branch above Retinaculum 1 ½ fingers

35 Ends by dividing into: 1.Superficial Branch 2.Deep Branch All Hypothenar muscles All Interossei Adductor Pollicis 3 rd & 4 th Lumbricals

36 Sciatic Nerve Roots L4 L5 S1 S2 S3 It arises from: L4 – S3 Sciatic nerve

37 Sciatic Nerve Extent Sciatic nerve Piriforms muscle Inferior border of Piriforms to Lower 1/3 of the thigh

38 Course & Branches Leaves pelvis through Greater Sciatic foramen Sciatic nerve

39 Biceps femoris Semitendinosis Adductor Magnus Semimembranosus

40 Sciatic nerve Tibial nerve Common Peroneal nerve Divides into: Tibial nerve Common Peroneal nerve

41 Tibial Supplies Muscles of the foot Tibial Supplies Superficial Posterior Compartment of leg

42 Sciatic Nerve Common Peroneal Supplies Anterior Compartment of leg Lateral Sural nerve Common Peroneal


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