2.  Roots  C5  C6  C7  C8  T1  Trunks  Upper 5,6  Middle 7  Lower 8,1  Divisions  Anterior – primarily flexors  Posterior – primarily extensors  Cords  Lateral C5,6,7  Posterior C5,6,7,8  Medial C8,T1

4.  1 st cervical nerve exits ABOVE C1 vertebra  2 nd through 7 th nerves exit above corresponding vertebrae  8 th cervical nerve exits BELOW C7 vertebra Note: There are 7 cervical vertebrae There are 8 cervical nerves

6.  Defined: The defined segmental portion of the skin innervated by the sensory component of each spinal nerve.  Sensory testing helps localize the level of the nerve root lesion Note: Territories of dermatomes do overlap

10.  C5  C6  C7  C8  T1

11.  Spinal Cord Segments  C5, C6, C7  Muscles Innervated  Serratus

12.  Spinal Cord Segment  C5 (C4 is variable)  Muscles Innervated  Levator  Rhomboids

13.  Spinal Cord Segments  C5, C6  Muscles Innervated  SC

14.  Spinal Cord Segments  C4, C5, C6  Muscles Innervated  SS  IS

15.  Innervates volar aspect of U.E.  Spinal Cord Segments  C5  C6  C7  C8  T1

16.  Innervates the dorsal aspect of the U.E.  Spinal Cord Segments  C5  C6  C7  C8  T1

17.  Spinal Cord Segments  C5, C6, C7  Muscles Innervated  Pec. Maj.

18.  Gives rise to 2 nerves  Spinal Cord Segments  C5  C6  C7

19.  Gives rise to 5 nerves  Spinal Cord Segments  C5  C6  C7  C8  T1

20.  Gives rise to 5 nerves  Spinal Cord Segments  C8  T1

21.  Spinal Cord Segments  C8, T1  Muscles Innervated  Pec. Maj.  Pec. Min.

22.  Spinal Cord Segments  C5, C6  Muscles Innervated  Subscapularis

23.  Spinal Cord Segments  C6, C7, C8  Muscles Innervated  Lat. D.

24.  Spinal Cord Segments  C5, C6  Muscles Innervated  T. Maj.  Subscapularis

25.  Spinal Cord Segments  C8  T1

26.  Spinal Cord Segments  C8  T1

27.  Spinal Cord Segments  C8, T1  Muscles Innervated  FCU, FDP (4,5), PB, ADM, ODM, FDM, ADD POL, FPB (deep head), Lum (4,5) DI, PI

28.  Spinal Cord Segments  C5, C6  Muscles Innervated  T. Min.  Deltoid

29.  Spinal Cord Segments  C5, C6, C7, C8, T1  Muscles Innervated  Triceps, Anconeous, BR, Brachialis, ECRL

30.  Spinal Cord Segments  C5, C6, C7  Muscles Innervated  BB, CB, Brachialis

31.  Spinal Cord Segments  C5, C6, C7, C8, T1  Muscles Innervated  PT, FCR, PL, FDS, FDP (2,3), FPL, FPB, APB, OP, PQ, LUM (2,3).

33.  Due to traction  Traumatic injuries  Contusion  Disruption of blood supply  Laceration

34.  Fracture  Dislocation  Compression Sites  Low lesion  Ant. Interosseous lesion  Lesion proximal to elbow

36. Wasting of the thenar eminence and unable to oppose the thumb

37.  Fractures  Lacerations  Low Lesions  High Lesions

38. Cubital tunnel Guyon’s canal Midpalm

39. Wasting of hypothenar muscles, interossei, and two medial lumbricals

40.  Fractures  Dislocations  Posterior Interosseous Lesions  Mid-humeral Lesion  High Lesion  Sensory Loss

41. Anatomy of the Radial Nerve Deltoid tuberosity Radial Groove (Spiral Groove)

42. Wrist, thumb, and finger extensors weakness

43.  Brachial plexopathies require thorough understanding of anatomy  Specialized sensory and motor testing can help localize the pathology

44. Hoppenfeld, S., (2000). Physical examination of the spine and extremities. In S. Hoppenfeld (Ed.), Physical examination of the cervical spine and temporomandibular joint (p.105-132). Norwalk, CT: Appleton and Lange