Brachial plexus

The video tutorial explores the brachial plexus, a part of the peripheral nervous system. It covers the roots, trunks, divisions, cords, and terminal branches of the brachial plexus, detailing their formation and function. The tutorial also discusses other nerves arising from the brachial plexus and provides clinical notes on thoracic outlet syndrome. The content is structured to enhance understanding of the brachial plexus anatomy and its clinical relevance.

Where does the brachial plexus begin?

• In the chest cavity

• In the lower limb

• In the neck between the anterior and middle scalene muscles

• In the lower back

Which spinal nerves form the roots of the brachial plexus?

• L1 to L5

• T2 to T5

• C5 to T1

• C1 to C4

What are the three trunks of the brachial plexus?

• Superior, Middle, Inferior

• Upper, Lower, Central

• Anterior, Posterior, Lateral

• Medial, Lateral, Central

What do the anterior divisions of the brachial plexus trunks form?

• Posterior cord

• Medial cord

• Lateral cord

• Anterior cord

Which nerve is a terminal branch of the lateral cord?

• Musculocutaneous nerve

• Radial nerve

• Axillary nerve

• Ulnar nerve

Which nerve provides motor innervation to the deltoid muscle?

• Axillary nerve

• Median nerve

• Radial nerve

• Ulnar nerve

What is the largest nerve in the upper limb?

• Musculocutaneous nerve

• Median nerve

• Radial nerve

• Ulnar nerve

Which nerve arises from the C5 root and supplies the rhomboid muscles?

• Subclavian nerve

• Dorsal scapular nerve

• Suprascapular nerve

• Long thoracic nerve

What condition is caused by compression of the brachial plexus or subclavian vessels?

• Sciatica

• Cubital tunnel syndrome

• Thoracic outlet syndrome

• Carpal tunnel syndrome

Which nerve provides sensory innervation to the medial forearm?

• Lateral cutaneous nerve

• Medial cutaneous nerve of the forearm

• Radial nerve

• Axillary nerve