Age-Related Maturation of Wave V Latency of Auditory Brainstem Response in Children.
OBJECTIVE
Auditory brainstem response (ABR) is a noninvasive measurement of a stimulus-locked, synchronous electrical event. ABR provides information concerning the functional integrity of brainstem nuclei. Age is a key factor in the interpretation of ABR peak latency among different age groups. Progressively with time it follows a "maturation pattern" during which latencies decrease. Wave V is very prominent and reliable for detection of threshold in children. The present study was performed to see the effect of age related auditory maturation on ABR wave V latency in children.


METHODS
The study involved 80 subjects ranging in age from birth to 12 years. The subjects were divided equally into eight age groups. ABR were elicited by an acoustic click stimuli, brainstem responses collected through electrode and recorded at the same time. Latency of wave V was acknowledged.


RESULTS
Wave V latency decreased rapidly in early childhood, became slower after 3 years of age and completely matured by 12 years of age. There was no significant difference in latency of wave V between the ears with age.


CONCLUSIONS
There is a distinct maturation pattern of wave V latency in ABR for both ears. ABR is a reliable test to assess the functional maturation of wave V in children.
Rehabilitation Unit of Speech and Hearing, Himalayan Institute of Medical Sciences, SRHU, Jollygrant, Dehradun, India.; Department of ENT, Himalayan Institute of Medical Sciences, SRHU, Jollygrant, Dehradun, India.
Mukesh
M
Sharma
Department of ENT, Himalayan Institute of Medical Sciences, SRHU, Jollygrant, Dehradun, India.
Sampan Singh
SS
Bist
Rehabilitation Unit of Speech and Hearing, Himalayan Institute of Medical Sciences, SRHU, Jollygrant, Dehradun, India.; Department of ENT, Himalayan Institute of Medical Sciences, SRHU, Jollygrant, Dehradun, India.
Santosh
S
Kumar
ABR; Absolute latency; Age effect; Auditory maturation; Threshold