- See:
Motor Conduction Latency:
- Sensory Amplitude:
- among the earliest changes in a nerve compression sydrome is changes in distal sensory amplitude,
followed by an increase in distal sensory latency;
- Sensory Conduction Latency:
- more sensitive than is motor conduction velocity;
- amplitude of action potentials also indicates alteration of participating motor nerve axons;
- most electromyographers consider the following results abnormal (with control for the patient's age and limb temperature):
- an absolute sensory latency of more than 3.7 msec
- difference of 0.4 msec or more between values obtained for median nerve and those obtained for the radial or ulnar nerve;
The value of sensory latency measured on the four median innervated fingers for the diagnosis of the carpal tunnel syndrome.
