http://www.nitrc.org/forum/forum.php?forum_id=5284 <table border="0" width="100%"><tr><td align="left"/><td align="right"><a href="http://www.ncbi.nlm.nih.gov/sites/entrez?db=pubmed&amp;cmd=Link&amp;LinkName=pubmed_pubmed&amp;from_uid=26089109">Related Articles</a></td></tr></table> <p><b>Regional brain activity during jaw clenching with natural teeth and with occlusal splints: a preliminary functional MRI study.</b></p> <p>Cranio. 2015 Jun 19;:2151090315Y0000000017</p> <p>Authors: Ariji Y, Koyama S, Sakuma S, Nakayama M, Ariji E</p> <p>Abstract<br/> OBJECTIVE: The purpose of this study was to investigate regional brain activity during jaw clenching with natural teeth and with two types of occlusal splints using functional magnetic resonance imaging (fMRI).<br/> METHODS: Sixteen healthy volunteers were enrolled in this study. Blood oxygenation level-dependent (BOLD) fMRI signals were compared under three conditions: during clenching with natural teeth, with a soft splint, and with a hard splint. For each condition, 30-second jaw clenching followed a 60-second rest, and was repeated three times, with intervening 30-second rests. SPM 8 was used for the fMRI analysis.<br/> RESULTS: Blood oxygenation level-dependent signals during clenching with natural teeth increased in BA44, 45, and the cerebellum. Blood oxygenation level-dependent signals increased in those areas and in BA17, 18 during clenching with a soft splint. Use of the hard splint increased the BOLD signals in BA6 and BA20, 37 in addition to the areas previously mentioned. Blood oxygenation level-dependent signals in the left BA6, the left BA20, 37, and the right BA44, 45 were significantly higher during clenching with a hard splint than with natural teeth. These regions are associated with motor coordination, memory, and cognition, respectively.<br/> CONCLUSION: Jaw clenching with a hard splint caused activity in the widest brain regions, including the associated area with motor coordination.<br/> </p><p>PMID: 26089109 [PubMed - as supplied by publisher]</p> en-us Copyright 2000-2026 NITRC OSI Sun, 03 May 2026 21:49:03 GMT http://blogs.law.harvard.edu/tech/rss NITRC RSS generator