Detailed Anatomy of the BRACHIAL PLEXUS

The video tutorial provides a detailed explanation of the brachial plexus, starting with the concept of a plexus and its formation from the ventral Rami of the spinal cord. It covers the formation of trunks, divisions, and cords, and explains how these structures give rise to various nerves. The tutorial also discusses the specific muscles innervated by each nerve, providing a comprehensive understanding of the brachial plexus anatomy.

What is a plexus in the context of the nervous system?

• A single nerve that branches into multiple directions

• A series of nerves that run together

• A type of muscle tissue

• A network of blood vessels

Which spinal nerve roots primarily contribute to the brachial plexus?

• C1 to C4

• C5 to T1

• T2 to T5

• L1 to L5

What is the role of the superior trunk in the brachial plexus?

• It innervates the lower limb

• It connects directly to the spinal cord

• It gives rise to the suprascapular nerve

• It forms the posterior cord

How are the cords of the brachial plexus named?

• By the number of nerves they contain

• By their position relative to the axillary artery

• According to their length

• Based on their color

Which nerve is the only one to branch from the lateral cord?

• Lateral pectoral nerve

• Ulnar nerve

• Axillary nerve

• Radial nerve

What is the primary function of the thoracodorsal nerve?

• Innervates the deltoid muscle

• Controls the biceps brachii

• Provides sensory input to the forearm

• Innervates the latissimus dorsi muscle

Which muscles are innervated by the musculo cutaneous nerve?

• Triceps brachii and anconeus

• Biceps brachii, brachialis, and coracobrachialis

• Deltoid and teres minor

• Flexor carpi ulnaris and hand muscles

What is the main contribution of the radial nerve?

• Innervates the anterior arm compartment

• Innervates the posterior arm compartment

• Provides sensory input to the hand

• Controls the pectoralis major

Which nerve is formed by contributions from both the lateral and medial cords?

• Axillary nerve

• Median nerve

• Ulnar nerve

• Radial nerve

What is the primary role of the median nerve?

• Controls the deltoid muscle

• Provides sensory input to the upper arm

• Innervates the anterior forearm muscles

• Innervates the posterior forearm muscles