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		Microinjection of DAMGO but not DPDPE or U50488 into the Central Nucleus of Amygdala Suppressed Nociceptive Jaw Opening Reflex in Freely Moving Rats Jin-Sook Ju, Hyo-Soon Choi, Ho-Jeong Lee, Chang-young Jung, Kwang-Ryeol Lee, Yong-Chul Bae and Dong-Kuk Ahn  International Journal of Oral Biology :: Vol.29 No.2 pp.45-49 
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		Nucleus Tractus Solitarius- induced Suppression of the Jaw Opening Reflex and A Possible Interrelationship betweeen Antinociceptive and Cardiovascular Responses Dong-Kuk Ahn¹, Kyo-Han Kim², Eun-Kyung Yang, Hyung-Jin Kim, Jae-Sik Park, and Won-Jung Lee  International Journal of Oral Biology :: Vol.20 No.1 pp.57-63 
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		Antinociceptive and Cardiovascular Responses to Chemical Stimulation in the Periaqueductal Gray Dong-Kuk Ahn  International Journal of Oral Biology :: Vol.19 No.1 pp.13-18 
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