We know that marijuana can be used to treat a number of physical symptoms of illness and can in some cases be used to treat or slow the disease itself. But what is it about cannabis that gives it these abilities?
Medical studies on marijuana have been relatively limited, and many of the over-400 compounds it contains are not yet well understood. However, science has uncovered some of the mystery regarding a few of these compounds and their effects in the brain.
Some of the most medically important compounds contained in marijuana are known as cannabinoids. Cannabinoids are produced by almost every living being on earth, including humans. While medical science has long been aware of the cannabinoid system, which has been used by organisms for 600 million years, it wasn’t until 1988 that cannabinoid receptors were discovered in the brain. Two specific cannabinoid receptors, the CB1 and CB2 receptors, have been discovered to date. The CB1 receptor has been found to be responsible for regulating functions in the brain and central nervous system, while the CB2 receptor affects the gastrointestinal tract and the immune system. Together, these receptors are responsible for the regulation of pain, memory, mood, appetite, and inflammation in the body.
When marijuana is smoked, its cannabinoids are taken in by the receptors and are used to help in the regulation of bodily functions. They are also a contributing factor in marijuana’s effectiveness as a neuroprotectant, slowing degradation of the brain and its neurons and synapses. Cannabinoids are the reason behind the effectiveness of marijuana as a medical treatment in pain management, appetite stimulation, headache relief, spasms, loss of spasticity, and in slowing the progression of neurological or immunodeficiency diseases.
Cannabinoids and their receptors are an incredibly valuable discovery for medical science. Understood properly, these compounds have a great potential in the eradication of diseases as well as in the treatment of disease symptoms. However, more research is needed on the topic. We as a society need to put more emphasis on the medical research community and push for further research into cannabinoids and their receptors in the brain. The potential of these compounds is far too great to squander on illegality and the resulting difficulties imposed on the scientific community.
Some interesting facts about cannabinoids:
- Cannabinoids kill brain cells known as glioma, or tumor cells in the brain. All other healthy cells are protected by cannabinoids. It is believed that cannabinoids can be used to treat or cure cancer for this reason.
- Rats that have had their CB1 receptors blocked die young.
- CB2 receptors are found in white blood cells and regulate the shift of the immunological system to the anti-inflammatory mode.
- Cannabinoid receptors are abundant in: the cerebellum (movement/coordination), the hippocampus (learning/memory), the cerebral cortex (higher cognitive functions), the nucleus accumbens (“reward center”), and the basal ganglia (unconscious movement control).
- Cannabinoid receptors are also found in lower density in: the hypothalamus (body regulation of temperature, water & sugars), the amygdala (emotional response/fear), the spinal cord peripheral (sensation/pain), the brain stem (sleep/arousal, motor control), the central gray area (analgesia/pain control), and the nucleus of the solitary tract (visceral sensation, nausea/vomiting).