1 TÜRKİYE PROFESYONEL LİGLERİNDE GÖREV ... - Spor Bilim

Ref # : 589
Category : Movements and Training
Sub Category : Kinesiology
ANALYSIS OF AUDITORY EVOKED POTENTIALS IN ARCHERY: A
PRELIMINARY STUDY
* Hayri Ertan , 1Feza Korkusuz
* Physical Education and Sports Department, hertan@metu.edu.tr, +90 312 2104016
1 Middle East Technical University, Physical Education and Sports Dep.
Archery can be described as a static sport requiring strength and endurance of the upper body,
in particular the shoulder girdle. The bowstring is released when audible impetus is received
from a device called “clicker”. As the fall of the clicker is an acoustic stimulus, it evokes a
sequence of potentials that can be recorded from the scalp of an archer using computeraveraging
technique. The purpose of the current project will be the analysis of long-latency
Auditory Evoked Potentials in Archery. Two high level male archers aged 28 and 32 years old
respectively were participated in shooting and control trials. Shootings were performed from
18 m that is official competition distance with target face. Control trials were conducted in the
laboratory conditions without arrow shot. The auditory stimuli were the fall of the clicker
presented from bow handle. Electroencephalography (0.5–100 Hz) was recorded with
Ag/AgCl electrodes from 2 scalp locations: Right Mastoid and Left Mastoid with Cz
reference. There is a negative going wave form about 100 msec after the clicker’s fall that is
followed by positive going wave form about 200 msec after the fall of the clicker. It was also
found in control trials that attention has an effect on archery response. Response to click
sound has auditory and somatosensory components. However, somatosensory component
disappears because of the refractory period. The peak amplitude of the response may be used
as an indicator of attention level. It is concluded that N1 and P2 waves are observed during
archery shooting. As mentioned literature, N1 wave is related with attention. Thus,
observation of N1 can be an indication of attend condition of the archer.