Peripheral nerve

Question 1

Musculocutaneous nerve impingement
Signs and symptoms

Answer 1

• Weakness in elbow or shoulder flexion
• Atrophy of biceps brachii
• P or paraesthesia at lateral forearm

Question 2

Musculocutaneous nerve impingement cause

Answer 2

• Brachial plexus injury
• Compression injury- e.g., during weightlifting
• Shoulder dislocation
• Shoulder surgery
• Entrapment of nerve at elbow

Question 3

Musculocutaneous nerve impingement prognosis

Answer 3

• Several months typically required after axonotmesis injury
• 2-9 months

Question 4

Axillary nerve impingement S+S

Answer 4

• Shoulder or arm muscle weakness
• Shoulder or arm wasting
• Numbness in arm- around deltoid

Question 5

Axillary nerve impingement cause

Answer 5

• Systemic disorder that causes nerve inflammation
• Fracture of humerus
• Pressure from cast or splint
• Shoulder dislocation

Question 6

Axillary nerve impingement prognosis

Answer 6

• Full recovery usually occurs
• 6-12 months

Question 7

Femoral nerve impingement S+S

Answer 7

• Leg, ankle or foot numbness/tingling/weakness
• Lower back P
• Difficulty straightening knee, leg or ankle
• Muscle atrophy in legs
• Impaired gait

Question 8

Femoral nerve impingement cause

Answer 8

• Direct trauma
• Prolonged pressure on nerve
• Compression, stretching or entrapment of nerve- e.g., by tumour or abnormal blood vessel

Question 9

Femoral nerve impingement prognosis

Answer 9

• If left untreated, can lead to permanent damage or death of nerve

Question 10

Obturator nerve impingement S+S

Answer 10

• Medial thigh or groin P
• Weakness with leg adduction
• Sensory loss in medial thigh of affected side

Question 11

Obturator nerve impingement cause

Answer 11

• Compression during pregnancy
• Can become entrapped at exit of obturator canal or more distally by fascia
• Trauma
• Nerve being stretch during surgery

Question 12

Obturator nerve impingement prognosis

Answer 12

• Without treatment, entrapment of obturator nerve can lead to ongoing P in groin

Question 13

Sciatic nerve impingement S+S

Answer 13

• Painful- P may be stabbing, burning, stabbing
• Tingling- like pins and needles
• Numb down back of leg
• Weak hamstrings

Question 14

Sciatic nerve impingement cause

Answer 14

• Herniated disc
• Bony spur

Question 15

Sciatic nerve impingement prognosis

Answer 15

• Usually goes away on its own with time and self-care treatments
• Ice, stretching, NSAIDs