Search results
Results from the WOW.Com Content Network
The brain: For example, Broca's area, a small section of the human brain, has a critical role in linguistic capability. Hormones: Chemicals used to communicate among cells of an individual organism. Testosterone, for instance, stimulates aggressive behaviour in a number of species.
The survival of neurons is regulated by survival factors, called trophic factors. The neurotrophic hypothesis was formulated by Victor Hamburger and Rita Levi Montalcini based on studies of the developing nervous system. Victor Hamburger discovered that implanting an extra limb in the developing chick led to an increase in the number of spinal ...
Neuroscience is the scientific study of the nervous system (the brain, spinal cord, and peripheral nervous system), its functions, and its disorders. [1] [2] [3] It is a multidisciplinary science that combines physiology, anatomy, molecular biology, developmental biology, cytology, psychology, physics, computer science, chemistry, medicine, statistics, and mathematical modeling to understand ...
Brain regions involved in fear generalization include the amygdala and the hippocampus. [2] The hippocampus seems to be more involved in the development of context fear generalization (developing a generalized fear for a specific environment) than stimulus fear generalization (such as Little Albert's acquisition of a fear response to white ...
A large number of synapses are dynamically modifiable; that is, they are capable of changing strength in a way that is controlled by the patterns of signals that pass through them. It is widely believed that activity-dependent modification of synapses is the brain's primary mechanism for learning and memory. [11]
The novel object recognition (NOR) test is an animal behavior test that is primarily used to assess memory alterations in rodents. It is a simple behavioral test that is based on a rodents innate exploratory behavior. The test is divided into three phases: habituation, training/adaptation and test phase.
Many species have the ability to adapt through learning. [3] Organisms will often learn through various psychological and cognitive processes, such as operant and classical conditioning and discrimination memory. [3] This learning process allows organisms to modify their behavior to survive in unpredictable environments. [3]
The conflict between the size of the human foetal brain at birth, (which cannot be larger than about 400 cm 3, else it will not get through the mother's pelvis) and the size needed for an adult brain (about 1400 cm 3), means the brain of a newborn child is quite immature. The most vital things in human life (locomotion, speech) just have to ...