Suitable Alternative for Human Cadaver Temporal Bone Dissection: Comparative Micro Ear Anatomy of Cattle, Pig and Sheep with Human
- 4 Downloads
The study was undertaken to compare the micro ear anatomy of three commonly available animal models which are expected to have similar anatomy to human and to find out suitable model among them as an alternative for human cadaver temporal bone dissection. This is an observational study of comparison of micro ear anatomy of the three animal models with human. Decapitated heads of cattle, pig and sheep were collected from slaughter houses, soft tissues along with brain were removed and preserved in commercially available formalin preservative. CT scan was taken for the three specimens and 3D reconstructions were done. Each specimen was subjected to micro dissection and the anatomical features were studied and compared with human. Among the three animal models sheep is found to be an ideal model for a beginner because of ease of exposure of bone, very thin cortical bone, and no cellularity, good exposure of all the middle ear structures and similar interrelations of middle ear structures with human. Pig may not be an ideal model because of abundant fatty soft tissues, thick periosteum very narrow space occupied by the middle ear, difficulty in accessing cellularity small fragile ossicular chain and overhanging facial nerve.
KeywordsTemporal bone Dissection Cattle Pig Sheep Human Alternative Cadaver
External auditory canal
Temporo mandibular joint
Compliance with Ethical Standards
Conflict of interest
The authors declare that they have no conflict of interest.
Human and Animal Rights
As this study doesn’t involve humans or live animals it doesn’t attract either human or animal ethics committee approvals.
- 1.Irugu DVK, Singh AC, Sikka K, Bhinyaram J, Sharma SC (2016) Establishing a temporal bone laboratory in teaching institutes to train future otorhinolaryngologists and fundamentals of temporal bone laboratory: considerations and requirements. Indian J Otolaryngol HNS 68(4):451–455CrossRefGoogle Scholar
- 4.Borin A, Covolan L, Mello LE et al (2008) Anatomical study of a temporal bone from a non-human primate (callithrix sp). Rev Bras Otorhinolaryngol 74(3):370–373Google Scholar
- 5.Pracy JP, White A, Mustafa Y, Smith D, Perry ME (1998) The comparative anatomy of the pig middle ear cavity: a model for middle ear inflammation in the human? J. Ant. 192:359–368Google Scholar