it has nothing to do with hormones.
thyroxine
yes, phenylketonuria progressively leads to mental retardation. In phenylketonuria, there is lack of enzyme phenylalanine oxidase which generally oxidises phenylalanine to tyrosine. Hence, accumulation of phenylalanine occurs. This leads to a mousy smell a well as mental retardation.
The hormone is the growth hormone. It is responsible for growth
It was Rose Marie "Rosemary" Kennedy that had mental retardation because of lack of oxygen at birth.
Lowered metabolic rateaccompanied by mental and physical sluggishness
Somatotropic hormone is another name for growth hormone. If a body does not have enough it will not grow properly. One condition that results from lack of somatotropic hormone is called cretinism. Not only will the body not from properly, but there will likely also be a lack of mental development as well. The gland that is responsible for secreting somatotropic hormone is the anterior lobe of the pituitary.
Arrested physical and mental development resulting from a congenital lack of thyroid secretion is known as Cretinism.
The term retardation refers to any slowing, ex. retarded growth, mental function, maturation, the list goes on and on. If we take mental retardation as an example it can be caused by lack of nutrition (particularly vitamin deficiency but of course food in general is a prime cause), hypoxia (lack of oxygen to the brain not resulting in death), disease, heredity, or it can be somatic, resulting from improper division of reproductive cells during meiosis. While some instances of somatic mental retardation are chromosomal accidents (i.e. two normal parents produce a child with Down Syndrome) it can also be inherited through a Down Syndrome parent. If you want information on a specific type of retardation a more specific question may get you the answer you need.
It has been estimated in the past to be between 10% and 50%, but these numbers are thought to be overestimates resulting from the lack of facial expression and drooling
Common symptoms of autism includes aloofness, lack of interaction/emotion, or mental retardation. If you suspect your son of having autism, it would be best to consult your physician for a proper diagnosis.
Almost all inhalants cause permanent brain damage resulting from either the inhalation of the gas itself or lack of oxygen. This brain damage manifests itself as staggering, slurring of words, and mental retardation.
Teachers of mentally handicapped and emotionally handicapped children must develop presentations that allow and stimulate the students to understand and access the knowledge.Often the frustrations and emotional problems of the students causes behaviour problems like lack of attention, angry outbursts, withdrawal, and other problems. Teaching skills must mitigate this events.