1. Anood Alassaf :’) faculty of medicine … A second year victim
We’ll be talking about:
Spinal cord and spinal nerves
Brachial plexus
Brachial plexus
It can be your worst nightmares unless you follow up your lectures a day by day
Doctors love to ask a bout it in the exams
Medical important … you’ll know it by yourself
And why should I care?
Anood Alassaf :’) faculty of medicine … A second year victim

2. Vertebral column: 33 vertebrae 26 bone
5 of them fuse to make the sacrum
= considered 1 bone
4 fuse to form the coccyx

4. Divided into 31 segment Base of the brain At each segment
From each sides
there is a spinal
nerve
Between L1 and L2

5. 31 segments 8 cervical 12 thoracic 5 lumbar 5 sacral 1 coccygeal
Here it’s different
31 segments
8 cervical
12 thoracic
5 lumbar
5 sacral
1 coccygeal
In the thoracic part:
Each spinal nerve arises from its corresponding segment below the corresponding vertebra

6. Then each spinal nerve divides into:
Anterior ramus and posterior ramus

7. Brachial plexus
Is a network of nerve fibers (anterior rami) running from the spinal cord, formed by the lower four cervical and first thoracic (C5  T1 )
Proceeds through the neck, axilla, into the arm
Gives off many nerves that supply the shoulder, chest, and arms

8. trunks
divisions

9. M 3 1 2 5 4 cords trunks roots Terminal branches divisions c5 anterior
superior 2
lateral c6 12
posterior
anterior 13 5
posterior
posterior
middle c7 11
posterior 4 10 9 c8
medial
anterior
inferior T1 8 7 6
Posterior cord:
Upper subscapular nerve (9)
Lower subscapular nerve (10)
Middle subscapular nerve = Nerve to latissimus dorsi = thoraco dorsal (11)
Axillary nerve (12)
Radial nerve (13)
ULMAR
Lateral cord:
Musculocutaneous nerve (1)
Lateral root of median nerve (2)
Lateral pectoral nerve (3)
MLL
Medial cord:
Ulnar nerve (4)
Medial root of median nerve (5)
Medial pectoral nerve (6)
Medial cutaneous nerve of the arm(7)
Medial cutaneous nerve of the forearm(8)
UMMMM