Sensory conduction studies: Sensory median and conduction velocities and their sensory latencies by antidromic
Motor responses were orthodromic, whereas sensory responses were antidromic
VI Distal neuroanatomy [ILLUSTRATION FOR FIGURE 2 OMITTED]: antidromic
stimulation of distal peripheral nerve from the pedal ganglion produces short latency high-fidelity action potential rising from stable baseline (Walters et al.
As previously mentioned at first a conventional nerve conduction study was performed; according to it, distal median motor latency was obtained from abductor pollicis brevis muscle belly with stimulation at 8 cm proximal to it and for antidromic
sensory latency from the third digit while stimulating the median nerve 7 cm and 14 cm proximal to the active recording electrode from midpalm and wrist crease, respectively.
Ring and surface stimulating electrodes were used for orthodromic and antidromic
(sural nerve) stimulation respectively.
Fasiculations have been attributed to a prejunctional depolarizing action of Succinylcholine, resulting in repetitive ring of the motor nerve terminals and antidromic
discharges that manifest as uncoordinated vigorous contraction of the muscle bundles with no possibility of shortening and without synchronous activity in adjacent bundles.
sup] F waves, produced by antidromic
activation of a limited number of motor neurons, reflect activity at the interface between the peripheral nerves and the spinal cord.
Both motor conduction study (median and ulnar amplitudes and their motor distal latencies) and sensory conduction study (median and ulnar amplitudes and their sensory latencies by antidromic
stimulation) were conducted.
Orthodromic sensory nerve conduction studies of both the median and ulnar nerves and antidromic
sensory nerve conduction studies in both sural nerves were also normal.
AVRT, a wide QRS complex tachycardia, is the most common supraventricular arrhythmia in patients with accessory pathways.
Most likely mechanism was thought to be antidromic
SVT utilizing the AP.
In the crayfish ventral nerve cord, primary photoreceptors are identified by at least two criteria: the production of a slow depolarization, with superimposed action potentials, upon illumination, and the resetting of the endogenous rhythm by interpolated antidromic
impulses (Kennedy 1963).