Question 838
{"accessible":false,"alternatives":[{"id":4239,"text":"axillary nerve"},{"id":4240,"text":"median nerve"},{"id":4241,"text":"musculocutaneous nerve"},{"id":4242,"text":"radial nerve"},{"id":4243,"text":"ulnar nerve"}],"archived":false,"correctAlternativeId":4240,"explanation":"\u003cp\u003eThe median nerve runs through the carpal tunnel at the wrist. With damage to the nerve at this point, only the thenar muscles and radial two lumbricals\u0026nbsp;are paralyzed\u0026nbsp;with wasting of the thenar muscles. There will also be a loss of sensation to the thumb, adjacent 2 and a half fingers and the radial two-thirds of the palm of the hand.\u003c/p\u003e\u003cp\u003eDamage to the axillary nerve most commonly occurs with fractures of the surgical neck of the humerus or in anterior shoulder dislocations.\u003c/p\u003e\u003cp\u003eInjury to the musculocutaneous nerve is uncommon as it is protected within the axilla. Injuries can be a result of stab wounds.\u003c/p\u003e\u003cp\u003eInjury to the radial nerve can occur at the axilla or in the radial groove. Injuries at the axilla may be a result of shoulder dislocation or fractures of the proximal humerus. Injuries at the radial groove can occur with midshaft humerus fractures.\u003c/p\u003e\u003cp\u003eInjury of the ulnar nerve can occur at the elbow or wrist. Damage at the elbow is usually a result of a fracture to the medial epicondyle. Damage at the wrist can occur with lacerations to the wrist.\u003c/p\u003e","id":838,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/1342","nextQuestionPath":"/articles/brachial-plexus/questions/831","relatedArticles":[{"id":24692,"title":"Axillary nerve","link":"/articles/axillary-nerve?lang=us"},{"id":24691,"title":"Radial nerve","link":"/articles/radial-nerve-2?lang=us"},{"id":24693,"title":"Musculocutaneous nerve","link":"/articles/musculocutaneous-nerve?lang=us"}],"alsoUsedIn":[],"stem":"\u003cp\u003eWhich nerve of the arm is most at risk with\u0026nbsp;a laceration\u0026nbsp;to the anterior aspect of the wrist?\u003c/p\u003e","menuLinks":[{"text":"Report problem with question","url":"https://docs.google.com/forms/d/e/1FAIpQLSfO3soWYhOjJ7yErSysyCe5V4A1CqW7WK3rDA7MtAkecMGqNw/viewform?entry.1624461248\u0026entry.553583435=https://radiopaedia.org/questions/838"}],"attemptsPercentages":[{"alternativeId":"4239","percentage":1},{"alternativeId":"4241","percentage":3},{"alternativeId":"4242","percentage":12},{"alternativeId":"4243","percentage":14},{"alternativeId":"4240","percentage":70}],"promptToLogin":false,"questionManager":false,"articleId":"brachial-plexus"}