Attention-deficit/hyperactivity disorder( ADHD)
Attention-deficit/hyperactivity disorder, or ADHD, is a common neurobehavioral problem that affects children as well as some adults. Some research suggests that the cause of ADHD is a genetic deficiency of certain neurotransmitters.
Attention-deficit/hyperactivity disorder, or ADHD, is a common neurobehavioral problem that affects children as well as some adults. Some research suggests that the cause of ADHD is a genetic deficiency of certain neurotransmitters.
The brain is composed of millions of interconnecting nerve cells
called neurons. In order for a person to think, move, or feel, these
neurons must communicate with one another. They do so by sending and
receiving chemical messengers called neurotransmitters.
When a neurotransmitter is released from a neuron, it crosses a
gap called a synapse and binds to a receptor on another neuron, thus
passing on a signal.
The symptoms of the disorder include impulsiveness, hyperactivity, and an inability to maintain attention.
Neurotransmitters, such as dopamine, help regulate behavior.
Without dopamine, neurons in the frontal cortex of the brain, which is
responsible for attention, do not communicate properly. There is also
evidence that the neuronal receptors that recognize dopamine are
dysfunctional in people with ADHD.
Signs of ADHD
All signs do not have to be present for a diagnosis of
attention-deficit/hyperactivity disorder (ADHD). However, signs of
inattention must always be present for a diagnosis. Signs must be
present in two or more situations (for example, at home and at school)
and must interfere with social or academic functioning.
|
Δεν υπάρχουν σχόλια:
Δημοσίευση σχολίου