Grading rigor mortis with myotonometry — A new possibility to estimate time of death

Vain, Arved; Kauppila, Riitta; Humal, Leo-Henn; Vuori, Erkki

doi:10.1016/0379-0738(92)90172-s

Cited by 19 publications

(18 citation statements)

References 7 publications

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“…Forster measured rigor mortis of gastrocnemius muscles in rat cadavers isotonically and isometrically [9,10] by exposing only the calcaneal tendon. Schuck et al [11] and Vain et al [12,13] measured rigor mortis in human muscles in situ. Other researchers measured rigor mortis in muscles taken from cadavers.…”

Section: Introductionmentioning

confidence: 98%

Onset of rigor mortis is earlier in red muscle than in white muscle

Kobayashi

Takatori

Nakajima

et al. 2000

International Journal of Legal Medicine

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Rigor mortis is thought to be related to falling ATP levels in muscles postmortem. We measured rigor mortis as tension determined isometrically in three rat leg muscles in liquid paraffin kept at 37 degrees C or 25 degrees C--two red muscles, red gastrocnemius (RG) and soleus (SO) and one white muscle, white gastrocnemius (WG). Onset, half and full rigor mortis occurred earlier in RG and SO than in WG both at 37 degrees C and at 25 degrees C even though RG and WG were portions of the same muscle. This suggests that rigor mortis directly reflects the postmortem intramuscular ATP level, which decreases more rapidly in red muscle than in white muscle after death. Rigor mortis was more retarded at 25 degrees C than at 37 degrees C in each type of muscle.

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Section: Introductionmentioning

confidence: 98%

Onset of rigor mortis is earlier in red muscle than in white muscle

Kobayashi

Takatori

Nakajima

et al. 2000

International Journal of Legal Medicine

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“…Since 1930s, numerous scientists have focused on methods to determine the onset and process of rigor mortis, including elasticity (Bate Smith, 1939), ultramicroscopic observation (Suzuki, 1976), tensile and adhesive properties (Currie and Wolfe, 1980), myotonometry (Vain et al, 1992), isometric tension (Hertzman et al, 1993), NMR and NIR (Tornberg et al, 2000) and sonoelasticity (Ayadi et al, 2007). The above studies have given us a profound understanding on rigor mortis of skeletal muscles, especially of ''red" muscles, and a technological guidance to control meat quality (Lawrie and Ledward, 2006).…”

Section: Introductionmentioning

confidence: 97%

Tracing processes of rigor mortis and subsequent resolution of chicken breast muscle using a texture analyzer

Shi

et al. 2010

Journal of Food Engineering

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“…There is no accepted gold standard for the measurement of muscle tone, although several technologies have been recently adopted to quantify muscle tone in vivo (2,3,6,13,21,36,38). The above-referenced technologies quantify muscle tone characteristics with the use of a force applied perpendicularly to the tissue.…”

Section: Introductionmentioning

confidence: 99%

Responsiveness of Muscle Tone Characteristics to Progressive Force Production

Mustalampi

Häkkinen

Kautiainen

et al. 2013

Journal of Strength and Conditioning Research

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It is possible to measure muscle tone reliably, quickly and objectively using tonometers although they are not yet widely used. In clinical practice, it may be helpful if clinicians could assess the degree of contraction in different parts of a muscle without having to perform time-consuming electromyography measurements. The purpose of this study was to evaluate the responsiveness of different muscle tone characteristics to progressively increased contraction force of quadriceps muscle. Twenty healthy subjects (mean age 39.9 years, 50% women) volunteered. Using 2 different tonometers various muscle viscoelastic properties were measured. The frequency (hertz), logarithmic decrement, and stiffness (newtons per meter) of damped mechanical oscillation of the muscle tissue and tissue compliance (millijoules) were registered from rectus femoris muscle at rest and 20, 40, 60, 80% of maximal voluntary contraction determined using dynamometry. All the values changed linearly with increasing force level. Compliance, oscillation stiffness, and frequency parameters showed large effect sizes (ESs ≥ 0.8). The standardized respoknse mean for compliance was 5.3 (4.8-5.7) mJ, for oscillation stiffness 1.8 (1.3-2.2) N·m(-1), frequency 1.1 (0.6-1.5) Hz, and decrement -0.6 (-1.0 to -0.2). The results indicate that the compliance and oscillation stiffness parameters showed the highest responsiveness and can thus best detect changes in muscle contraction state. The additional value of using tonometers to measure these properties in clinical practice should be investigated further.

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Grading rigor mortis with myotonometry — A new possibility to estimate time of death

Cited by 19 publications

References 7 publications

Onset of rigor mortis is earlier in red muscle than in white muscle

Onset of rigor mortis is earlier in red muscle than in white muscle

Tracing processes of rigor mortis and subsequent resolution of chicken breast muscle using a texture analyzer

Responsiveness of Muscle Tone Characteristics to Progressive Force Production

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