Loss of feeling in index finger
Introduction
Introduction The median nerve injury of the hand is characterized by thumb abductor dysfunction caused by thumb abduction dysfunction and thumb and index finger dysfunction dysfunction, palm sacral half, thumb, food, middle and ring finger squat side half palm face, thumb finger Inter-articular joints and food, middle and ring refers to the sensory disturbance of the distal semi-final interphalangeal joint, which is mainly caused by the disappearance of the index finger. In principle, the damage to the hand nerve is the earlier the repair, the better the functional recovery. As long as the nerve damage is lighter, the broken ends are more neat, no obvious defects; the skin coverage is better, the wound contamination is lighter, and it is estimated that the infected person will not be infected after debridement, and the direct suture should be performed immediately in the first stage.
Cause
Cause
Median nerve injury occurs more frequently, and the injury site is mostly in the wrist or forearm, and the injured in the upper arm or ankle is smaller.
1, traction injury: the most common. Most of it is caused by the arm being caught in the machine.
Crush injury: previous arm fracture or scar contracture, often with severe extensive soft tissue injury.
2, cut injury: glass cuts in daily life or work, or accidental injury during forearm surgery.
3, gunshot wounds or drug mis-injection into the nerve trunk injury: compared with the above damage, these two types of injury cases are less.
Examine
an examination
Related inspection
Electromyography CT scan deep reflection test
1. The typical symptoms of median nerve injury are that the three fingers and one half of the temporal side disappeared. The index finger and the middle finger could not be fully flexed, and there was a sworn hand deformity.
2, history of trauma, according to the location of the injury, the area of hand loss and the movement of each finger movement, can be clearly diagnosed.
3, the diagnosis of this disease is mainly based on its clinical manifestations and medical history, auxiliary examination is less used. Mainly to carry out some regular physical inspections. For example, EMG can help to determine whether there is nerve damage and degree.
Diagnosis
Differential diagnosis
Differential diagnosis of the disappearance of the index finger:
1. Sensory disorder: The feeling is the direct reflection of various receptors on the human body in the human brain. Sensory disturbance is one of the common symptoms in nervous system diseases.
2, feeling separation: If there is a disease that destroys the back of the spinal cord, so that the deep feeling can not be transmitted upwards, then the position of the limb is not felt, it is unclear that it is bent. Because I lost my understanding of my body, I was awkward when I acted and walked and swayed. Visible sensory separation is very meaningful for the diagnosis of neurological diseases. The doctor judges where the disease is based on the distribution of various sensory disturbances. This is called location diagnosis.
3, numbness, pain or abnormal sensation of the distal extremities: sensory peripheral neuropathy, mainly manifested by different degrees of numbness, pain or abnormal feeling at the distal end of the extremities.
The typical symptoms of median nerve injury are that the three fingers and one half of the temporal side disappeared, the index finger and the middle finger could not be fully flexed, and there was a "sworn hand" deformity.
The history of trauma can be clearly diagnosed based on the location of the injury, the area in which the hand feels lost, and the paralysis of each finger movement.
