The aim of this essay is to show how the hemispheres of the brain specialize in doing certain functions, as well as to give psychological evidences to support the specializations. The essay will be divided into three parts. The first part of the essay will define key terms; the hemisphere and specialization or lateralization. The second part will look at various parts of the brain and the last part; will look at how the hemispheres of the brain specialize in doing various functions and the psychological evidences to support the hemispheric specializations. A conclusion will then be drawn based on the discussion.
First a stressor is recognised. Then a signal is sent to the hypothalamus in the brain. This signal triggers the release of adrenaline from the adrenal glands. This
The effects are alertness and arousal, and influences on the reward system. Anatomically, the noradrenergic neurons originate both in the locus coeruleus and the lateral tegmental field. The axons of the neurons in the locus
3. Biology: Know parts of a neuron, the function and location of each type of neuron (motor, sensory, interneuron). Know how an action potential travels through a neuron.
This area of the brain control motor function and directs the body’s muscles. “If this area is stimulated with an electrical current, various parts of the body twitch or move” (Coon, D., 2001).
Cognitive psychologists believe that mental processes and stored representations of the world determine behaviour and are central to human experience. Psychologists see the mind as a complex machine – where they believe that it is useful to model mental processes using an information-processing approach whereby: Information is examined from the outside world is received and encoded, Storage and representation of this information to ourselves, Ways in which this information is manipulated and used by the individual, And how we output information back into the world to be received by others. Many
Each of these lobes has different functions from each other. On the other hand, the neurotransmitters are the information carriers, they carry electrochemical signals to and from the brain throughout the entire body in human beings. Then, we have the nervous system which can actually be divided into two parts, the central nervous system (CNS) and the peripheral nervous system (PNS) where the brain and spinal cord are parts of the CNS. The PNS can still be divided into two specific parts, the somatic nervous system (SNS) and the autonomic nervous system (ANS). While the SNS directs the movements of the skeletal muscles, the ANS regulates involuntary processes such as the heart beating, breathing, blood pressure, and blood sugar level.
The nerve conduction velocity is determined by recording the motor response of a muscle to the stimulation of its motor nerve at two or more points along the nerve course. The time between stimulation and response is measured and compared to the distance between the point of stimulation and point of response. Precise parameters of measurement have been developed for the ulnar nerve and the motor response is measured over the abductor digiti minimi. The ulnar nerve comes from the medial cord of the brachial plexus, and runs inferior on the medial/posterior aspect of the
How do the physical properties of the ears help the brain decode and interpret sounds? Sound travels as osccialtion through some medium. The function of ears is to transmit the sound into electric messages which are sent to the brain which perceives and interprets the sound. Ears consist of three parts the outer ear, middle and inner ears. The outer ear consists of the pinna which collects the sound and transmits it to the ear canal, which amplifies the sound and transmits it to the tympanic membrane, the division between the outer ear and the middle ear.
Parietal lobe - responsible for sensory information from the body, also where letters are formed, putting things in order and spatial awareness. Occipital lobe- responsible for processing information related to vision Cerebrum lobe - biggest part of the Brain its role is memory, attention, thought, and our consciousness, senses and movement. Hippocampus = responsible for memory forming, organizing and storing and emotions. 3. Explain why depression, delirium and age related memory impairment may be mistaken for dementia.