Chapter 3 - Neuroscience Flashcards
Brain parts
Neuroscience
Study of the brain and nervous system
How can we study the brain
Neuroimaging (MRI, CAT scans)
Central Nervous System (CNS)
Consists of brain and spinal cord
Peripheral Nervous System (PNS)
Consists of nerves that deliver information to CNS
Afferent neurons
Carry signals from PNS to CNS
Efferent Neurons
Carry signals from CNS to PNS
Interneurons
Found between sensory and motor neurons
Somatic Nervous System
voluntary movements, sends info to cns
Autonomic Nervous System
Contains sympathetic and parasympathetic nervous system
Sympathetic Nervous System
Fight or flight response
Parasympathetic Nervous System
Brings body back to resting state
Spine
Extends down from the base of the brain and mediates sensory and motor information
What part is responsible to reflexes
The spine
Why is the spine responsible for reflexes?
It takes longer to get to brain because of neurons it has to cross over
What dictates a spinal cord injury?
When the nerves that makeup the spinal cord are damaged
Hindbrain Function
regulates basic life functions
Medulla - which brain part?
Hindbrain
Pons - which brain part?
Hindbrain
Cerebellum - which brain part?
Hindbrain
Reticular formation - which brain part?
Hindbrain
Midbrain Function
Helps make movements more smooth
Substantia nigra - which brain part?
Midbrain
Thalamus - which brain part?
Forebrain
Hypothalamus - which brain part?
Forebrain
Pituitary Gland - which brain part?
Forebrain
Limbic System - which brain part?
Forebrain
Basal Ganglia - which brain part?
Forebrain
Cerebral Cortex- which brain part?
Forebrain
Medulla function
regulates heartbeat, breathing
Pons Function
sleep, dreams, facial expressions
Cerebellum
learning with movement (playing piano)
Reticular Formation
alertness, arousal, mood
Thalamus Function
processes senses before being sent to the brain
Hypothalamus function
movement and basic drives
Limbic System function
emotion, learning, memory
Pituitary gland function
regulates hormones
Limbic System (2parts)
Amygdala, hippocampus
Amygdala
processes fear
Hippocampus
learning and memory
Basal ganglia
voluntary movement control, motivation and reward learning
Cerebral cortex
makes humans unique from other animals
- consciousness, language, thought
Sensory cortex
registers sensory neurons (touch)
Motor cortex
Registers motor neurons (muscles)
Association Cortex
higher-order processing - planning, thinking, and integrating information
Occipital lobe location
back of brain
Occipital lobe function
vision
Temporal lobe location
Sides of the brain
Temporal lobe function
auditory processing (language)
Parietal Lobe
sensory perception (managing taste, hearing etc)
Frontal lobe location
Front of the brain
Frontal lobe function
higher intellectual thinking
Prefrontal lobe function
memory, morality, mood, planning
Parallel Processing
Communication between all the lobes to perform complex functions
Broca’s area - which lobe?
Frontal lobe
Broca’s area - function
Speech production
Wernicke’s area - which lobe
Temporal lobe
Wernicke’s area - functions
language comprehension
Neuron
a nerve cell
Sensory
Gathers sensory info
Motor
communicates with muscles
Interneuron
Communicates with sensory and motor
Dendrite
Receives information from other neurons
Cell body
passes message through axon IF enough stimulation
Axon
Carries the neuron’s message to terminal buttons
Myelin sheath
Speeds up neural impulses along axon
Terminal buttons
Release neurotransmitters
Glia
Cells that make up nervous system besides neurons
Astroglia
helps heal brain damage
Oligodendroglia
Provides myelin to speed up neurons
Microglia
Cleans up dead cells and prevents infections
Resting potential
when neurons are at rest (negative charge on inside and relative to outside)
Action potential
the process of a neuron firing
All or none principle
A neuron will be fired only if there is enough potential
What is a refractory period
Cooldown time after a neuron has fired
Nodes of Ranvier
Placed between myelin sheath to speed up the message
What is the synapse
Space between neurons
Where are neurotransmitters released
Synapse
What triggers the release of neurotransmitters?
Action potential
Postsynaptic potentials
electrical events that happen when neurotransmitters bind to receptors
Inhibitory postsynaptic potentials
Hyperpolarization of the neuron decreasing likelihood of an action potential
Excitatory postsynaptic potentials
Depolarization of the neuron to increase likelihood of action potential
Neural network
When neuron form circuits and networks that help them expand their communication in different areas of the brain
Traumatic brain injury
Concussions, spinal cord injuries
Acquired brain injury
infections, exposure to toxins, tumours, diseases, stroke
Corprus callosum
Connects the two hemispheres made of neural fibres
Split brain patients
Corprus callosum is severed to treat severe epilepsy
Neuroplasticity
brain’s ability to to make neural connections - make up for lost or injured parts
Evolutionary Psychology
studies how evolution shaped the body and brain
Evolution
process of development
Fitness
successfully growing to maturity and have offspring
Evolution by natural selection
animals that pass on certain attributes to help survive
Darwin’s First Observation
Animals change overtime
Darwin’s Second Observation
Aspects that seem different on the outside are similarly structured underneath
Darwin’s Third Observation
Selective breeding can lead to changes in appearance
Darwin’s Fourth Observation
Not all animals that are born will mature and reproduce
Evolution of the brain
Skull sizes are bigger now allowing for a larger frontal cortex