منابع مشابه
EMG study of hand muscle recruitment during hard hammer percussion manufacture of Oldowan tools.
The activity of 17 hand muscles was monitored by electromyography (EMG) in three subjects during hard hammer percussion manufacture of Oldowan tools. Two of the subjects were archaeologists experienced in the replication of prehistoric stone tools. Simultaneous videotapes recorded grips associated with the muscle activities. The purpose of the study was to identify the muscles most likely to ha...
متن کاملThe sweet spot of a biological hammer: the centre of percussion of glyptodont (Mammalia: Xenarthra) tail clubs.
The importance of the centre of percussion (CP) of some hand-held sporting equipment (such as tennis rackets and baseball bats) for athletic performance is well known. In order to avoid injuries it is important that powerful blows are located close to the CP. Several species of glyptodont (giant armoured mammals) had tail clubs that can be modelled as rigid beams (like baseball bats) and it is ...
متن کاملCranial percussion.
Percussion of the skull dates from a time when there were virtually no radiological methods for examining the skull and brain. Three apparently independent contributions appeared within the years 1893-1895. The sound elicited, tenderness, and auscultatory percussion have each been employed for diagnostic purposes, but have long been superseded.
متن کاملIf I had a hammer
We present the case of a 64-year-old man who was referred to our service after sustaining a self-inflicted nail-gun injury to his chest. He received three nails penetrated into his chest. Computer tomography revealed no massive haemorrhage or damage to major vessels. He underwent an emergency sternotomy, two nails caused pericardial perforation and myocardial injury were noted easily and remove...
متن کاملA carpenter's hypothenar hammer syndrome.
To cite: di Summa PG, Yvon A, Raffoul W, et al. BMJ Case Rep Published online: [please include Day Month Year] doi:10.1136/ bcr-2014-204779 DESCRIPTION A 34-year-old man, right-handed, smoker, presented to A&E with a 2-month history of pain, numbness and cold sensitivity in the fourth and fifth digits of his right hand. He had not suffered from any recent trauma; his usual activity was carpentr...
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ژورنال
عنوان ژورنال: Journal of the American Medical Association
سال: 1908
ISSN: 0002-9955
DOI: 10.1001/jama.1908.25410120054003a