Brachial plexus

The video provides a comprehensive overview of the brachial plexus, detailing its structure from roots to terminal branches. It explains the function of each component, including roots, trunks, divisions, cords, and branches, and their roles in motor and sensory innervation of the upper limb. The video also covers the anatomical relationships and clinical relevance of the brachial plexus.

What is the primary function of the brachial plexus?

• To provide motor and sensory innervation to the upper limb

• To control the lower limb movements

• To manage the digestive system

• To regulate the autonomic nervous system

Which spinal nerves form the roots of the brachial plexus?

• C1 to C4

• C5 to T1

• T2 to T5

• L1 to L5

What is the dermatome associated with the C6 root?

• Middle finger

• Ring and little fingers

• Shoulder

• Thumb and index finger

Which trunks are formed by the C5 and C6 roots?

• Lower trunk

• Upper trunk

• None of the above

• Middle trunk

What is the function of the anterior division of the brachial plexus?

• Innervates extensors

• Innervates flexors

• Innervates the digestive system

• Innervates the respiratory system

Which nerve is a branch of the lateral cord?

• Lateral pectoral nerve

• Ulnar nerve

• Radial nerve

• Median nerve

Which muscles are innervated by the axillary nerve?

• Biceps and brachialis

• Deltoid and teres minor

• Triceps and forearm extensors

• Flexor carpi ulnaris

What is the primary function of the radial nerve?

• Innervates the pectoralis major

• Innervates intrinsic hand muscles

• Innervates triceps and forearm extensors

• Innervates forearm flexors

Which nerve innervates the flexor carpi ulnaris?

• Axillary nerve

• Median nerve

• Ulnar nerve

• Radial nerve

Which nerve is responsible for innervating the thenar muscles?

• Median nerve

• Musculocutaneous nerve

• Ulnar nerve

• Radial nerve