This video explains the brachial plexus formation, including its roots, trunks, divisions, cords, and branches (including MCQ, practical, and interactive questions).

* ()الفصول (الطوابع الزمنية)
00:00 Intro (مقدمة)
00:22 Content (المحتوى)
01:12 Formation
06:12 Stages
13:02 Site
19:06 Branches
16:56 Branches from the roots
20:56 Branches from the trunks
22:40 Branches from the cords
22:58 Lateral cord
26:05 Medial cord
28:52 Posterior cord
32:53 What is the meaning of the root value of a nerve?
34:13 What is Mshape?
35:45 What is Yshape?
36:53 MCQ
40:19 Intermuscular spaces
36:53 MCQ
41:15 Practical questions
45:43 Interactive questions

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1. What is the usual number of branches of the lateral cord of the brachial plexus?
A. 1
B. 2
C. 3
D. 4
E. 5
2. What is the origin of the suprascapular nerve?
A. Roots of the brachial plexus
B. Upper trunk
C. Middle trunk
D. Posterior cord
E. Lateral cord

3. The lateral cord of the brachial plexus is named because it lies immediately lateral to which of the following structures?
A. Long head of the biceps brachii muscle
B. Axillary artery
C. Subclavian vein
D. Pectoralis minor muscle

4. Where are the roots and trunks of the brachial plexus that could be found during the dissection of the following compartment of the body?
A. Anterior triangle of the neck
B. Posterior triangle of the neck
C. Suboccipital triangle of neck
D. Axilla

5. Where are the divisions of the brachial plexus that could be found during the dissection of the following compartment of the body?
A. Anterior triangle of the neck
B. Posterior triangle of the neck
C. Behind clavicle
D. The axilla

6. From where does the nerve supply of the deltoid muscle arise as a branch?
A. Roots of brachial plexus
B. Trunks of brachial plexus
C. Medial cord of brachial plexus
D. Posterior cord of brachial plexus

7. What is the origin of the nerve whose injury is responsible for the scapula winging after mastectomy?
A. Roots of brachial plexus
B. Trunks of brachial plexus
C. Medial cord of brachial plexus
D. Lateral cord of brachial plexus

8. What is the usual number of branches of the medial cord of the brachial plexus?
A. 1
B. 2
C. 3
D. 4
E. 5

9. Injury of the upper trunk of the brachial plexus leads to loss of sensation on which of the following sides of the forearm?
A. Front
B. Back
C. Medial
D. Lateral

10. A 24yearold patient has been improperly fitted with axillarytype crutches (عكازات إبطية) which have put pressure on the posterior cord of the brachial plexus. Which of the following terminal nerves would most likely be affected?
A. Median
B. Ulnar
C. Radial
D. Musculocutaneous

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1. The roots of the brachial plexus lie in ................................. while the cords
lie in ........................................

2. The branches of the roots of the brachial plexus are:
a) ............................................. b) .............................................

3. The root value of the lower trunk is ......... and that of the axillary nerve is .......



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