Search PubMed⌕ Search

SEARCH · Search PubMed

Results for “Rigor Mortis”

Search indexed PubMed citations on genomics, clinical trials, systematic reviews and public health. Explore titles, authors and supplied subject terms, then open the PubMed record.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 19 recordsLinked to original sources
PubMedDate not supplied

Experimental evaluation of rigor mortis. III. Comparative study of the evolution of rigor mortis in different sized muscle groups in rats.

The use of new methods and an appropriate apparatus has allowed us to make successive measurements of rigor mortis and a study of its evolution in the rat. By a comparative examination on the front and hind limbs, we have determined the following: (1) The muscular mass of the hind limbs is 2.89 times greater than that of the front limbs. (2) In the initial phase rigor mortis is more pronounced in the front limbs. (3) The front and hind limbs reach maximum rigor mortis at the same time and this state is maintained for 2 hours. (4) Resolution of rigor mortis is accelerated in the front limbs during the initial phase, but both front and hind limbs reach complete resolution at the same time.

Animals↗
PubMedDate not supplied

Experimental evaluation of rigor mortis. IV. Change in strength and evolution of rigor mortis in the case of physical exercise preceding death.

Evolution of rigor mortis in rats exercised before death shows the following characteristics with respect to controls: (1) Its intensity is increased in the initial phase. (2) It reaches its maximum development at the same time. (3) Higher maximum values are reached (in our experiments 1.39 times the maximum values for controls). (4) Higher values are maintained from 100 minutes to 16 hours with statistically significant differences. (5) It attains resolution at the same time.

Animals↗
PubMed1978

Studies on the estimation of the postmortem interval. 3. Rigor mortis (author's transl).

The authors have devised a method for classifying rigor mortis into 10 types based on its appearance and strength in various parts of a cadaver. By applying the method to the findings of 436 cadavers which were subjected to medico-legal autopsies in our laboratory during the last 10 years, it has been demonstrated that the classifying method is effective for analyzing the phenomenon of onset, persistence and disappearance of rigor mortis statistically. The investigation of the relationship between each type of rigor mortis and the postmortem interval has demonstrated that rigor mortis may be utilized as a basis for estimating the postmortem interval but the values have greater deviation than those described in current textbooks.

Adolescent↗
PubMed1979

On the estimation of lay-time by measurements of rigor mortis.

Measurements of the torgue to overcome rigor mortis on the legs of 101 male human cadavers at 5 degrees C are reported. There seems to exist an upper limit, which is dependent on the lay-time, above which no value occurs, but below which every value may be found. By calculating the 90% tolerance limits for lay-times grouped at 12-hourly intervals, this upper limit was found to decrease exponentially with lay-time. This may be used for the estimation of maximum lay-times from rigor mortis measurements.

Cadaver↗
PubMed1977

[A new formula for the measurement of rigor mortis: the determination of the FRR-index (author's transl)].

The manual examination of rigor mortis as currently used and its often subjective evaluation frequently produced highly incorrect deductions. It is therefore desirable that such inaccuracies should be replaced by the objective measuring of rigor mortis at the extremities. To that purpose a method is described which can also be applied in on-the-spot investigations and a new formula for the determination of rigor mortis--indices (FRR) is introduced.

Arm↗
PubMed1992

Grading rigor mortis with myotonometry--a new possibility to estimate time of death.

Myotonometry has been applied to grade rigor mortis. The myotonometer is a hand-held instrument which gives a mechanical impact against the muscle. The muscle responds with a damped vibration which is registered and treated mathematically. The period and the logarithmic decrement of decay of the vibrations were found to change with the development of rigor mortis. The method gives quantitative information on the muscular stiffness and it can be used when estimating the time of death.

Death↗
PubMed1978

The effect of rigor mortis on the passage of erythrocytes and fluid through the myocardium of isolated dog hearts.

The effect of normal and artificially induced rigor mortis on the vascular passage of erythrocytes and fluid through isolated dog hearts was studied. Increased rigidity of 6-mm thick transmural sections through the centre of the posterior papillary muscle was used as an indication of rigor. The perfusibility of the myocardium was tested by injecting 10 ml of 1% sodium fluorescein in Hanks solution into the circumflex branch of the left coronary artery. In prerigor hearts (20 minute incubation) fluorescein perfused the myocardium evenly whether or not it was preceded by an injection of 10 ml of heparinized dog blood. Rigor mortis developed in all hearts after 90 minutes incubation or within 20 minutes of perfusing the heart with 50 ml of 5 mM iodoacetate in Hanks solution. Fluorescein injected into hearts in rigor did not enter the posterior papillary muscle and adjacent subendocardium whether or not it was preceded by heparinized blood. Thus the vascular occlusion caused by rigor in the dog heart appears to be so effective that it prevents flow into the subendocardium of small soluble ions such as fluorescein.

Animals↗
PubMedDate not supplied

An ultramicroscopic study on rigor mortis.

Gastrocnemius muscles taken from decapitated mice at various intervals after death and from mice killed by 2,4-dinitrophenol or mono-iodoacetic acid injection to induce rigor mortis soon after death, were observed by electron microscopy. The prominent appearance of many fine cross striations in the myofibrils (occurring about every 400 A) was considered to be characteristic of rigor mortis. These striations were caused by minute granules studded along the surfaces of both thick and thin filaments and appeared to be the bridges connecting the 2 kinds of filaments and accounted for the hardness and rigidity of the muscle.

Animals↗
PubMed1977

[Measurements of rigor mortis on human skeletal muscles in situ (author's transl)].

The torque, necessary to break the rigor mortis of arms and legs at 17 female and 35 male cadavers stored at a temperature of 4 degrees C was determined. The values show differences between male and female cadavers to an extent, that both groups have to be treated separately. Relating the torque to the diameter or the cross section of the limb does not eliminate the differences: Frequently considerable differences between left and right limbs were obtained, however, without preference of one side over the other. There is no direct functional relationship between post mortem time and the intensity of r.m., but the values occasionally allow estimates on the maximum time post mortem.

Adolescent↗
PubMedDate not supplied

Experimental evaluation of rigor mortis. I. Histochemical analysis of rat skeletal muscle in the early post-mortem period.

Histochemical investigation of rat skeletal muscle samples removed immediately post mortem from exercised rats gave the following results: (1) Of the oxidoreductase enzymes studied, there was a slight increase in the activity of cytochrome oxidase. (2) There was no change in the acid- and alkali-stable actomyosin ATPase activity. (3) There was a notable decrease in glycogen concentration. In the case of strychnine intoxication: (1) There was no change in oxidoreductase enzymes. (2) There was an increase in the activity of alkali-stable ATPase in white fibres. (3) The glycogen concentration notably decreased. There was no change in the activity of enzymes studied in those animals sacrificed by anoxia.

Adenosine Triphosphatases↗