Diagnosing Nerve Damage with EMG [Example 1] | UE, Proximal to Elbow

The video tutorial explores the process of diagnosing nerve injuries using EMG studies. It begins by discussing different types of nerve injuries, such as demyelination and axonal injuries. The focus then shifts to identifying the location of the injury, particularly in relation to nerve roots and the brachial plexus. The tutorial explains how to analyze radiculopathy and rule it out by examining specific nerves and muscles. It also distinguishes between proximal and distal nerve damage, emphasizing the importance of understanding the brachial plexus structure. The video concludes with a detailed analysis of potential issues within the brachial plexus, providing a methodical approach to tracing nerve damage.

What are the two main types of nerve injuries discussed in the video?

• Demyelination and axonal injuries

• Bone and cartilage injuries

• Muscle and tendon injuries

• Ligament and joint injuries

What is required for a condition to be considered a true radiculopathy?

• Muscles with different nerve roots are affected

• No muscles with a common nerve root are affected

• Only one muscle with a common nerve root must be affected

• All muscles with a common nerve root must be affected

Which nerve is directly affected by a C5 radiculopathy?

• Long thoracic nerve

• Ulnar nerve

• Dorsal scapular nerve

• Median nerve

What does the dorsal ramis innervate?

• Muscles of the leg

• Muscles of the hand

• Muscles of the forearm

• Deep muscles of the back

What conclusion can be drawn if the long thoracic nerve is normal?

• Radiculopathy is unlikely

• Peripheral nerve damage is confirmed

• Radiculopathy is confirmed

• Muscle injury is likely

What is the significance of determining if damage is proximal or distal to the elbow?

• It confirms the presence of a muscle injury

• It indicates a joint problem

• It helps identify the involvement of the brachial plexus

• It rules out any nerve involvement

Which nerves are affected in the case of proximal damage to the brachial plexus?

• Femoral, sciatic, and tibial nerves

• Phrenic, vagus, and accessory nerves

• Median, radial, and ulnar nerves

• Axillary, suprascapular, and musculocutaneous nerves

What is the commonality among the affected nerves in the superior trunk?

• They all originate from the inferior trunk

• They all originate from the middle trunk

• They all originate from the superior trunk

• They all originate from the lateral cord

How can you trace back the axillary nerve to the site of damage?

• Using the anterior division of the middle trunk

• Using the medial division of the superior trunk

• Using the posterior division of the superior trunk

• Using the lateral division of the inferior trunk

What is the purpose of drawing out the brachial plexus during analysis?

• To identify the site of nerve damage

• To confirm muscle injuries

• To rule out joint problems

• To diagnose bone fractures