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| Mechanical Performance of Cranial Bone in Impact Protection of Woodpecker Brain: A Finite Element Study |
| WANG Li-zhen, FAN Yu-bo |
| Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Beijing 100191, China |
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Abstract Human head impact injuries caused by a sudden impact force are very common in aviation lifesaving, car crash accident, war or sports activities. Yet, an intriguing example of nature is woodpecker which is free from head injury even it drums trunk continually at a speed of about 6-7 m/s and a deceleration of about 1000 g. Woodpecker must have special characteristics to attenuate repetitive impact force to sustain rapid pecking without brain injury. In this study, the effect of mechanical property of cranial bone on the brain during impact was investigated using the finite element (FE) approach. It was demonstrated that the pressure, Von-Mises stresses and shear stress at the same point on the posterior of woodpecker's brain were decreased greatly compared with hoopoe and lark. It was stated that the higher strength of woodpecker's cranial bone might play an important role for preventing woodpecker's head injury.
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Received: 20 September 2016
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Corresponding Authors:
FAN Yu-bo. E-mail: yubofan@buaa.edu.cn
E-mail: R 318.01
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[1] Spring LW. Climbing and pecking adaptations in some north American woodpecker[J]. Condor, 1965, 67: 457-488.
[2] May PR, Fuster JM, Haber J, et al. Woodpecker drilling behavior-An endorsement of the rotational theory of impact brain injury[J]. Archives of Neurology, 1979, 36: 370-373.
[3] Wang LZ, Cheung JT-M, Pu F, et al. Why do woodpeckers resist head impact injury: A biomechanical investigation[J]. Plos One, 2011, 6: e26490.
[4] Bock WJ. An approach to the funcitional analysis of bill shape[J]. The Auk, 1966, 83:10-51.
[5] Wg CdrR Madan, A.C.H.S., Gp Capt YP Jalpota. Retrospective analysis of fatal aircraft accident investigations during the period 1975-2004: A reality check[J]. Indian Journal of Aerospace Medicine, 2006, 50:34-38.
[6] Barry PB, Robert CC, Sarah BK, et al. Catastrophic head injuries in high school and college football players[J]. The American Journal of Sports Medicine, 2007, 35: 1075-1081.
[7] Oda J, Sakamoto J, Sakano K. Mechanical evaluation of the skeletal structure and tissue of the woodpecker and its shock absorbing system[J]. JSME International Journal Series A, 2006, 49: 390-396.
[8] Gibson LJ. Woodpecker pecking: how woodpeckers avoid brain injury[J]. Journal of Zoology, 2006, 270: 462-465.
[9] Muller R. Hierarchical microimaging of bone structure and function[J]. Nature Review Rheumatol, 2009, 5: 373-381.
[10] Wang LZ, Zhang HQ, Fan YB. Comparative study of the mechanical properties, micro-structure, and composition of the cranial and beak bones of the great spotted woodpecker and the lark bird[J]. SCIENCE CHINA Life Sciences, 2011, 54(11): 1036-1041.
[11] King AI, Yang KH, Zhang L, et al. Is head injury caused by linear or angular acceleration[C]? Lisbon (Portugal):IRCOBI Conference, 2003.
CLC number: Q 954 Document code:A Article ID: 1004-0552(2016)04-0157-05
Grant sponsor: National Natural Science Foundation of China; grant number:10925208 and 11120101001 |
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