Jaws Case Study Example | Topics and Well Written Essays - 500 words

Jaws - Case Study Example C. jacchus and C. pygmaea exhibit longer masseter and temporalis muscles. They also have higher fiber to muscle mass ratio. They have a greater excursion potential of distal tendons hence the muscle can stretch further. The more fibres in C. Jacchus and C. Pygmaea lead to wider jaw gapes and hence can offer more power during gouging (Campbell 25). They also have shorter angle of pinnation, larger PCSA as well as a smaller proportion of tendons. S. Oedipus has a greater tendon proportion as compared to common marmoset masseter. Hence, S.oedipus has a lower muscle excursion and a lower contraction velocity leading to shorter stretching and hence smaller gapes. It also has a greater pinnation angle and a smaller PCSA. They, therefore, produce a smaller biting force as compared to C. jacchus and C. pygmaea. (Garber, Estrada, Heymann and Strier 208). Burrows and Nash (10), explains that the lateral pterygoid muscle in C. pygmaea and C. jacchus gives them a wider gape. They also found no difference in the anteroposterior ratios of both species. There is little to suggest that these mammals have undergone a reorganisation of the structures of the soft tissue. Kilgore et al (11) suggest that C. pygmaea, C. jacchus and S. oedipus have evolved significantly to adapt to their mode of feeding. Both the new literature cited and the course work books agree that C. pygmaea and C. jacchus are able to have a wider jaw gapes than S. oedipus. This has influenced their feeding habits as well as their diet. C. pygmaea and C. jacchus have a long mandible that enable it produce a stronger bite as the masseter and temporalis are longer as compared to the latter’s shorter that are short (Lord 56). Future clinical investigations should aim to establish whether muscles have an optimal length that, therefore, produces optimal biting force. Also, investigations should look into the positions of the stretched