Search results
Results from the WOW.Com Content Network
A lack of sleep is not only dangerous to the health of humans but it also puts the health of these animals at risk, no matter their shape, size or species. ... brain size and body mass are ...
Zebrafish have also been used to test the medicinal benefits of certain psychoactive drugs, particularly how they can be used to treat mental health problems. [38] A study looking into the antidepressant properties of ketamine using zebrafish as subjects found that when exposed to small amounts of ketamine (2 mg/L), zebrafish displayed more ...
It is difficult to develop an animal model that perfectly reproduces the symptoms of depression in patients. It is generic that 3 standards may be used to evaluate the reliability of an animal version of depression: the phenomenological or morphological appearances (face validity), a comparable etiology (assemble validity), and healing similarities (predictive validity).
Sleep can follow a physiological or behavioral definition. In the physiological sense, sleep is a state characterized by reversible unconsciousness, special brainwave patterns, sporadic eye movement, loss of muscle tone (possibly with some exceptions; see below regarding the sleep of birds and of aquatic mammals), and a compensatory increase following deprivation of the state, this last known ...
Research has found that animals can have an overall positive effect on health and improve mood and quality of life. [ 12 ] [ 7 ] [ 13 ] Studies have documented some positive effects of the therapy on subjective self-rating scales and on objective physiological measures such as blood pressure and hormone levels. [ 14 ]
Animal studies have partly validated these claims. For instance, one study conducted with rats showed that REM sleep deprivation after learning a new task disrupted their ability to perform the task again later. This was especially true if the task was complex (i.e., involved using unusual information or developing novel adaptive behaviours). [38]
Sleep deprivation studies show that sleep is particularly important to normal brain function. Sleep is needed to remove reactive oxygen species caused by oxidative stress (and generally autophagy) and to repair DNA. REM sleep also decrease concentration of noradrenaline, which when in excess amount causes the cell to undergo apoptosis.
Claims made as to the efficacy of equine therapies for mental health purposes have been criticized as lacking proper medical evidence due in large part to poor study design and lack of quantitative data. Ethical questions relating to its expense and its continued promotion have been raised in light of this lack of evidence.