Complete and easy explanation of Brachial Plexus. Memoona Arshad

1. International School of Medicine,
Kargyzstan

2. Anatomy of Brachial Plexus
Presented by:
Memoona Arshad

3. Introduction
• Network(plexus) of nerves
• Lies in neck and axilla
• Formed by the anterior rami of the lower
four cervical nerves(C5, C6, C7, C8) and
first thoracic nerve (T1)
• Extends from the spinal cord, through
the cervicoaxillary canal in the neck, over the first
rib, and into the armpit.
• Supplies afferent and efferent nerve fibers to the
chest, shoulder, arm, forearm, and hand.

4. Structure
• Roots
– Five Ventral rami (C5,C6,C7,C8,T1)
• Trunks
– Upper, Middle, Lower
• Divisions
– Three anterior
– Three posterior
• Cords
– Lateral, Medial, Posterior
• Branches
– From Roots
• Dorsal Scapular Nerve (C5)
• Nerve to Subclavius (C5,C6)
• Long Thoracic Nerve (C5,C6,C7)
– From Trunks
• Suprascapular Nerve (C5,C6)

5. Branches

6. Formation

7. Location
• Roots
– Behind scalenus anterior, emerge between scalenus muscles
• Trunks
– Cross lower part of posterior triangle of neck
• Divisions
– Behind clavicle
• Cords
– Arrange around 2nd part of Axillary art of axilla
 Supraclavicular Part – Roots and Trunks
 Infraclavicular Part – Cords and Branches

8. Anatomical illustration of brachial
plexus

9. Function
• The brachial plexus provides
– nerve supply to the skin and muscles of the arms,
with two exceptions:
• the trapezius muscle (supplied by the spinal accessory
nerve)
• an area of skin near the axilla (supplied by
the intercostobrachial nerve).

10. Brachial Plexus Injury
• This picture is a simulated
example of motorcyclist
colliding with the floor at an
angle, which may damage the
brachial plexus nerves.
• The photo shows how head and
shoulder are extremely
separated, which may stretch or
even tear the nerves in the
between area.
• Protective gear can help
prevent nerve damage by
providing extra support on the
opposite side of the head to
prevent over-stretching the
neck.

11.  THANK YOU 