The second stage of a seizure is ictus and is characterized by convulsions. This suggests that the abnormal firing in the sensory cortex must move to the motor cortex. Additionally, sensory and motor cortex are interdependent. Many sensory inputs that reach sensory cortex give rise to a signals in the motor cortex. As mentioned above, motor cortex plays a central role in epilepsy.
Each neurotransmitter will have a specific effect on specific nerve cells. Neurotransmitters can either be excitatory or they can be inhibitory. When a neurotransmitter is excitatory then they will be able to help communicate a nerve impulse. If a neurotransmitter is inhibitory then it will hinder the communication of the nerve impulse. A good example of a neurotransmitter that is excitatory is known as acetylcholine.
Stimuli’s are what transfers to the brain. The brain is dependent on neurotransmitters to send signals for one part of the brain to another part. The neurotransmitters are let go or released by nerve cells, which is what helps in carrying out cognitive functioning. When brain cells are damaged
Explain the role the hypothalamus and pituitary gland have in the regulation of the endocrine system. What would happen if there were no negative feedback control on growth hormone and thyroid hormone? The hormonal secretion is controlled by negative feedback mechanisms. The stimulus triggers the production of hormone worse direct or indirect effects that reduce the intensity of the stimulus. The simplest case, endocrine activity may be controlled by humoral stimuli – changes in the composition of the exetracelluar fluid.
Positive (+) 1.00 is the strongest or perfect positive relationship and indicates that variables change together, either increasing or decreasing simultaneously. Negative (–) 1.00 is the strongest or perfect negative relationship and indicates that variables change in opposite directions: as one variable increases another variable decreases. 3. Describe the direction of the relationship between the Hamstring strength index 60/s and the Shuttle run test. The relationship between Hamstring strength index 60 degree/s and the Shuttle run test is a negative relationship due to r moves away from zero in negative direction and r = −0.149, the strength of this negative relationships would be weak with r -0.5 r=-0.528**, is more significant since p =0.002< 0.01, where r = −0.498** is significant at p =0.004< 0.01.
c) How does one nerve cell communicate with another? - Nerve cells communicate with one another through neurotransmitters. 2. a) Explain what neurotransmitters are? - Neurotransmitters are chemical messengers that cross the synaptic gaps between neurons. When released by the sending neuron, neurotransmitters travel across the synapse and bind to receptor sites on the receiving neuron, thereby influencing where that neuron will generate a neural impulse.
The hippocampus on the other side is responsible for the production of corticosteroids (chemicals that produce physiological responses to stimuli). How the mind creates memories is controlled by the hippocampus. So as to work efficiently, the amygdala and the hippocampus rely on each other greatly. The amygdala regulates the responses to stimuli and the hippocampus uses these responses in the formation of both short-term and long-term memories. Damage to the amygdala or hippocampus causes loss of emotions and memory respectively.
Neurotransmitters are chemical released by the nerves that deliver messages across a synapsis to another nerve. They exist in the spinal cord, peripheral nerves, certain glands and throughout the brain. The neurotransmitter's serotonin is linked to sleep, appetite, pain suppression and emotions. Second dopamine involves voluntary movement. Moreover the neurotransmitter norepinephrine is involved in memory, wakefulness, and increases the heart rate.
The abnormality lies mainly in the pathway linking the frontal lobes of the cerebral cortex with the basal ganglia. The frontal lobes are responsible for deliberation and judgement (thinking), while the basal ganglia act as a relay station in the planning and execution of movements (behaviour). PET Scans of patients with active symptoms of OCD show heightened activity in parts of the frontal cortex known as the Orbital frontal cortex (OFC). Obsessive and compulsive symptoms can be caused by a loss of tissue in the caudate nuclei, areas in the basal ganglia that filter messages coming from the OFC before passing the more important ones to other parts of the brain. Researchers suspect that the caudate nuclei form perform this selection function poorly with those with OCD.
The nature of stress is very much similar to that of pressure. Many people immediately consider pressure to have only negative qualities. However, though, pressure is actually beneficial in that it aids the motivation for greater achievement. Concerning the issue of college pressure, William Zinsser, conversely, supports a more negative view on pressure. He