Nerves of the Mandibular Musculature of the Sand Tiger Shark Carcharias taurus (Rafinesque, 1810) (Chondrichthyes: Odontaspididae) Nervios de la Musculatura Mandibular del Tibur車n Toro Carcharias taurus (Rafinesque, 1810) (Chondrichthyes: Odontaspididae)

作者：Andre Luis da Silva Casas; Wagner Intelizano; Marcelo Fernandes de Souza Castro; Arani Nanci Bonfim Mariana

来源：International Journal of Morphology, 2005.

• Tiburon
• Anatomia
• Nervio trigemino
• Musculatura mandibular
• Shark
• Anatomy
• Trigeminal nerve
• Mandibular musculature

During this study, fifteen shark heads of sand tiger shark Carcharias taurus (Rafinesque, 1810) were analyzed. The studied material was obtained in the Santos Fishing Terminal, S o Paulo, Brazil. The heads dissection was focused on the characterization of the mandibular muscles and on the description of the mandibular branch of the trigeminal nerve. The C. taurus mandibular muscles are represented by: m. preorbitalis, m. levator palatoquadrati, m. quadratomandibularis and m. intermandibularis. The origin of the trigeminal nerve of C. taurus is located in a lateral portion of the medulla oblongata. In the orbita, the trigeminal nerve branches off to originate the mandibular branch that innervates the muscles which are derived from the mandibular arch. The proximal branches of the trigeminal nerve mandibular branch innervate the m. levator palatoquadrati. The muscles preorbitalis and quadratomandibularis receive fibers from the intermediate branches of the trigeminal nerve mandibular branch and the distal ramification of the mandibular branch can be visualized in the m. intermandibularis Fueron analizadas 15 cabezas de tibur車n toro Carcharias taurus (Rafinesque, 1810), obtenidas en el Terminal Pesquero de Santos, S o Paulo, Brasil. La disecci車n permiti車 caracterizar los m迆sculos mandibulares y describir la rama mandibular del nervio trig谷mino. Los m迆sculos mandibulares de C. taurus son: M. preorbitalis, M. levator palatoquadrati, M. quadratomandibularis y M. intermandibularis. El origen aparente del nervio trig谷mino de C. taurus est芍 localizado en la porci車n lateral de la m谷dula oblonga. En la 車rbita, las ramas del nervio trig谷mino salen para dar origen a la ramificaci車n mandibular, la cual inerva a los m迆sculos derivados del arco mandibular. Las ramificaciones proximales de la rama mandibular del nervio trig谷mino inervan al M. levator palatoquadrati. Los Mm. preorbitalis y quadratomandibularis reciben fibras de las ramas intermedias de la ramificaci車n mandibular del nervio trig谷mino, y el M. intermandibularis recibe la ramificaci車n distal de la rama mandibular del nervio trig谷mino