Intro to Neurobiological Approach (#1-158) Flashcards
synapse
The gap between one neuron and another.
myelin
A fatty white substance that surrounds the axon of some nerve cells. It is essential for the proper functioning of the nervous system.
dendrites
The branched fibers of neurons that receive incoming signals.
axon
The extended fiber of a neuron through which nerve impulses travel from the soma to the terminal buttons.
medulla
The region of the brainstem that regulates breathing, waking, and heartbeat.
neurons
A cell in the nervous system specialized to receive, process, and/or transmit information to other cells. aka Brain cells.
materialism
A tendency to consider material possessions and physical comfort as more important than spiritual values.
dualism
The division of something conceptually into two opposed or contrasted aspects, or the state of being so divided. Mind and body are distinct.
reductionism
Attributing an ability to a specific part of the brain.
bad reductionism
Assuming (wrongly) a certain part of the brain is the only part responsible for a specific function.
localization of function
The idea that different parts of the brain are responsible for different functions.
pineal gland
A pea-sized gland near center of brain that produces melatonin (sleep hormone).
frontal lobes
Region of the brain located above the lateral fissure and in front of the central sulcus (forehead); involved in motor control and cognitive activities. It is the last part of brain to develop. Concerned with reasoning, planning, parts of speech and movement (motor cortex), emotions, and problem-solving.
parietal lobes
Region of the brain behind the frontal lobe and above the lateral fissure; contains somatosensory cortex. Concerned with perception of stimuli such as touch, pressure, temperature and pain.
temporal lobes
Region of brain found below the lateral fissure; contains auditory cortex. Concerned with perception and recognition of auditory stimuli (hearing) and memory (hippocampus).
occipital lobes
Rearmost region of the brain; contains primary visual cortex. Concerned with many aspects of vision.
central nervous system (CNS)
The part of the nervous system consisting of the brain and spinal cord.
peripheral nervous system (PNS)
The part of the nervous system composed of the spinal and cranial nerves that connect the body’s sensory receptors to the CNS and the CNS to the muscles and glands. Contains somatic and autonomic nervous systems.
autonomic nervous system (ANS)
The subdivision of the peripheral nervous system that controls the body’s involuntary motor responses by connecting the sensory receptors to the central nervous system (CNS) and the CNS to the smooth muscle, cardiac muscle, and glands. Contains sympathetic and parasympathetic nervous systems
somatic nervous system
Part of peripheral nervous system. Controls Voluntary Movement. The subdivision of the peripheral nervous system that connects the central nervous system to the skeletal muscles and skin.
sympathetic nervous system
Stress. The subdivision of the autonomic nervous system that deals with emergency response and the mobilization of energy. Relaxation.
parasympathetic nervous system
Relax. The subdivision of the autonomic nervous system that monitors the routine operation of the body’s internal functions and conserves and restores body energy.
cerebellum
The region of the brain attached to the brainstem that controls motor coordination, posture, and balance as well as the ability to learn control of body movements. Implicit memory. How-to memories.
anterior cerebellum
The portion of the cerebellum responsible for mediating unconscious proprioception (a sense of self and perception of outside world). Nonverbal communication.
limbic system
The region of the brain that regulates emotional behavior, basic motivational urges, and memory, as well as major physiological functions. PHHAT(
hypothalamus
The brain structure that regulates motivated behavior (such as eating and drinking) and homeostasis. Regulates 4 F’s, fight, flight, feast, love.
lateral hypothalamus
Makes you feel hungry. If removed, rat will never eat, then starve.
ventromedial hypothalamus
Makes your feel full. If removed, rat will never stop eating, it will become extremely obese.
hippocampus
The part of the limbic system that is involved in the acquisition of explicit memory. factual memory.
anterior hippocampus
encodes memory. In McGuire study, it was smaller in London taxi drivers, but bigger in normal people.
posterior hippocampus
retrieves memory. It’s responsible for navigational memory. It is inversely related to anterior hippocampus size. In McGuire study, posterior hippocampus was significantly bigger in London taxi drivers.
medial hippocampus
Full function unknown. Something to do with memory, part of what was removed from H.M.’s brain.
amygdala
The part of the limbic system that controls emotion, aggression, and the formation of emotional memory. frequently immature in adolescents, boys.
reticular formation
The region of the brain stem that alerts the cerebral cortex to incoming sensory signals and is responsible for maintaining consciousness and awakening from sleep.
pons
The region of the brainstem that connects the spinal cord with the brain and links parts of the brain to one another.
corpus callosum
The mass of nerve fibers connecting the two hemispheres of the cerebrum. What was severed to stop Sperry’s seizures.
angular gyrus
A region of the inferior parietal lobe of the brain that is involved in the processing of auditory and visual input and in the comprehension of language.
fusiform gyrus
Area in the temporal lobe thought to be important in facial recognition, color processing, and word recognition.
myelin sheath
A wrapping of myelin around certain nerve axons, serving as an electrical insulator that speeds nerve impulses to muscles and other effectors. a white, lipoid (fatty) material in casing many neuron fibers and enables faster transmission of an impulse.
mirror neurons
A neuron that fires both when an animal acts and when the animal observes the same action performed by another. Thus, the neuron “mirrors” the behavior of the other, as though the observer were itself acting. 2 types: empathy and motor.
motor cortex
The region of the cerebral cortex that controls the action of the body’s voluntary muscles.
left motor cortex
Part of motor cortex
prefrontal cortex
This brain region has been implicated in planning complex cognitive behavior, personality expression, decision making, and moderating social behavior.
telomeres
Caps on end of chromosomes that protect the chromosomes fro fraying. They shorten faster with chronic stress causing faster aging.
allele
A variant form of a gene, two alleles per gene, one from each parent.
5-HTT
The serotonin transporter protein, associated with both depression and autism.
cerebral cortex
The outer surface of the cerebrum. 80% of weight of human brain; 70% of CNS’s neurons; wrinkled outer portion of un-myelin aided cells (cerebrum) covering both hemispheres; processes thought, vision, language, memory, and emotions; most recently of all part of nervous system… grey matter.
pituitary gland
Located in the brain, the gland that secretes growth hormone and influences the secretion of hormones by other endocrine glands. “Master Gland”.
parathyroid
Small endocrine glands in the neck, usually located within the thyroid gland, which produce parathyroid hormone. he sole purpose of the parathyroid glands is to regulate the calcium level in our bodies within a very narrow range so that the nervous and muscular systems can function properly. also controls phosphate levels (which influence levels of excitability)
hemispherectomy
Surgical procedure in which one cerebral hemisphere (half of the brain) is removed, disconnected, or disabled.
neuroplasticity
The brain’s ability to reorganize itself by forming new neural connections throughout life. Opposes lateralization of function.
pruning
When brain prunes or gets rid of excess and unused connections and brain cells in brain. related to use it or lose it , ages 2-3 and 13-17.
ESB
Electrical Stimulation Brain. Delgado used invasive form of this technique on bull.
CAT scan
A really sophisticated x-ray of the brain. It gives us a 3D picture of the brain which is great for locating tumors, but it does NOT show brain activity or function. Computerized tomography.
PET scan
Brain video produced by a device that obtains detailed pictures of activity in the living brain by recording the radioactivity emitted by cells during different cognitive or behavioral activities. best way for us to see activity in the brain. Positron Emission Tomography.
EEG
Measures brain waves. If you are awake it measures what we call alpha waves (short active waves) and when you are asleep it measures other waves like delta waves (long inactive waves). It is used commonly in sleep research. Electroencephalogram
MRI
Gives us the most detailed picture of the brain. There is no radiation so the procedure is safe, but once again it only gives us an idea of structure and not function. Magnetic Resonance Imaging.
fMRI
A technique for revealing blood flow and, therefore, brain activity by comparing successive MRI scans. Functional Magnetic Resonance Imaging.
neurotransmitters
Chemical messengers released from neurons that cross the synapse from one neuron to another, stimulating the postsynaptic neuron.
glucocorticoids
3rd responder stress hormone. Stress hormones secreted by the outer parts of adrenal glands. Helps with long term healing and stamina.
neuropeptides
Small protein-like molecules (peptides) used by neurons to communicate with each other. hormone neurotransmitter.
epinephrine
1st responder stress hormone (neurotransmitter). aka adrenaline. Activates a sympathetic nervous system by making the heart beat faster, stopping digestion, enlarging pupils, sending sugar into the bloodstream, preparing a blood clot faster. aka adrenaline (hormone).
norepinephrine
2nd responder stress hormone. Noradrenaline, a chemical which is excitatory, similar to adrenaline, and affects arousal and memory; raises blood pressure by causing blood vessels to become constricted, but also carried by bloodstream to the anterior pituitary which relaxes ACTH thus prolonging stress response.
dopamine
Chemical that influences voluntary movement, learning, pleasure, memory,-is implicated in Parkinson’s disease and schizophrenia; in Parkinson’s disease a causes tremors, muscle spasms, increasing muscular rigidity; recently implicated in ADHD
acetylcholine
The first neurotransmitter to be identified. It is a chemical transmitter in both the peripheral nervous system (PNS) and central nervous system (CNS) in many organisms including humans. involved in muscular contraction.
serotonin
The “mood molecule”, a chemical that affects regulation asleep, dreaming, mood, hunger, pain, and aggressive behavior; and attaches to many receptors (receptor sites).