It ’s time to update the anatomy textbooks – a brand unexampled body part has been get a line ! A muscleman layer in the lower jaw that plays an all-important role in chewing has been described by scientists for the very first clock time in the journalAnnals of Anatomy .
nestle late in the masseter muscle – the most prominent of the jaw muscle – the novel muscle is found between the back of the malar bone and lower jaw .
you could finger the masseter muscle by placing your fingers on the back of your boldness while you jaw . It was generally look at to lie in of just two layers : one recondite and one superficial . However , some texts have alluded to a secret topnotch - deep third layer .
“ In perspective of these contradictory description , we wanted to examine the structure of the masseter muscle again comprehensively , ” Professor Jens Christoph Türp , from the University Center for Dental Medicine Basel , said in astatement .
It ’s this problematical third layer that the squad , led by Türp and Dr Szilvia Mezey from the Department of Biomedicine at the University of Basel , have finally discovered .
“ This mysterious section of the masseter muscularity is understandably distinct from the two other layers in term of its class and function , ” Mezey said .
The fresh level is involved in stabilise the lower jaw , Mezey add , having studied its organisation of muscle fibers . She also think it to be the only part of the masseter that pulls the low jaw back .
The team dissected 12 heads continue in formaldehyde and canvas CT scan of 16 “ reinvigorated ” cadavers , plus an MRI scan from a living subject to place the position and probable part of the raw muscle layer .
Of naturally , a glazed new body part require a glossy new name . In their newspaper , the team suggests it be calledMusculus masseter pars coronidea – stand for coronoid part of the masseter – as it impound to the muscular ( coronoid ) part of the blue jaw .
The finding is not only anatomically important , the source conclude , but it could be clinically relevant too . Precise knowledge of the masseter musculus will improve surgery and therapy of the lower jaw .
“ Although it ’s generally arrogate that anatomical research in the last 100 year has left no stone unturned , our determination is a flake like zoologists chance on a Modern coinage of craniate , ” said Türp .
