biceps reflex

Biceps reflex refers to the biceps tendon that produces an elbow-flexion. The afferent nerve is the sensory fiber in the musculocutaneous nerve, the reflex center is the gray matter of the neck 5-6, the efferent nerve is the somatic motor fiber of the musculocutaneous nerve, and the effector is the biceps. The patient is supine, the forearm is half flexed, the muscles are relaxed, and the hand is placed on the abdomen. The examiner pressed the left thumb with the biceps tendon slightly above the elbow joint, and then slammed the thumb with the right hand. When normal, it causes the forearm to flex. Basic Information Specialist classification: neurological examination classification: neuroelectrophysiology Applicable gender: whether men and women apply fasting: not fasting Tips: Relax your arms before checking. Normal value The normal reaction is contraction of the biceps muscle. Clinical significance Abnormal results: normal deep reflexes of the biceps reflexes are transmitted by the musculocutaneous nerves, which are still transmitted by the musculocutaneous nerves through the cervical spinal cord 5-6. Abnormal biceps reflexes suggest that the reflex arc is damaged. People who need to be examined: Patients with susceptibility to musculoskeletal nerves. Precautions Contraindications before examination: Relax your arms before checking. Requirements for inspection: You can choose the lying position method or the seat position method when checking. Inspection process (1) The lying position examination method: the patient is supine, the forearm is half flexed, the muscles are relaxed, and the hand is placed on the abdomen. The examiner pressed the left thumb with the biceps tendon slightly above the elbow joint, and then slammed the thumb with the right hand. When normal, it causes the forearm to flex. (2) Sitting position examination method: the patient is seated, the examiner holds the patient's elbow with his left hand, the left forearm holds his forearm, and then presses the left thumb to the patient's biceps tendon, and slams the thumb with the percussion hammer. . When normal, the reaction is the same as above. During the examination, if the above reaction is hyperactive, weakened or disappeared, the biceps reflex is abnormal. Not suitable for the crowd Inappropriate people: patients with arm disabilities or injuries. Adverse reactions and risks Nothing.

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