Neuroscience: Brain Structures and Functions

Explore how neurons transmit signals through dendrites, soma, and axons, using electrical action potentials and chemical neurotransmitters at synapses, enabling sensory, motor, and interneurons to communicate.

Explore how neurons use membranes, diffusion, and concentration gradients to move ions through ion channels and transporters. Learn how active transport powered by ATP underpins neural signaling.

Neurons regulate ion flow across membranes with sodium and potassium channels, creating resting potential and firing action potentials via depolarization, threshold, repolarization, and hyperpolarization.

Explore how transporters actively move ions and molecules across membranes using uniporters, symporters, and antiporters, often with ATP, and contrast with ion channels that passively move ions down gradients.

Explore how neurons communicate across synapses by calcium-triggered release of neurotransmitters from presynaptic vesicles, activating receptors to depolarize or hyperpolarize postsynaptic neuron and terminate signals via enzymatic breakdown and reuptake.

Explore how neurotransmitters in the synaptic gap excite or inhibit the postsynaptic neuron, shaping action potentials via electrochemical signaling, and learn about dopamine, serotonin, GABA, glutamate in learning and memory.

Explore saltatory conduction in myelinated axons, where action potentials jump between nodes of Ranvier, increasing speed and reducing energy cost via clustered sodium channels and electrotonic spread.

Explore how Phineas Gage's 1848 injury to his left brain, via an iron rod, transformed his personality, revealing the prefrontal cortex's role in decision making, planning, and social behavior.

Investigate how the frontal lobes, especially the prefrontal cortex, orchestrate personality, impulse control, motivation, planning, and attention, with left verbal and right spatial memory and language areas like Broca's area.

The pre motor cortex guides goal-directed movements by planning and integrating sensory input, while the supplementary motor area coordinates sequences and inhibits actions, and the primary motor cortex drives movement.

Explore the parietal lobe, a cerebral cortex region behind the frontal lobes that processes somatosensory and visual input, maps body sensation, and supports navigation and numbers.

Explore the temporal lobes and their roles in processing sensory input, auditory processing, visual processing of faces and scenes, language comprehension, memory coding, and emotion processing.

Process visual information from the retina and optic nerve to the occipital lobes. Translate light into images and coordinate with the eye and brain for motion, color, and shape perception.

Describes how light becomes electrical signals in rods and cones, with rods for night vision and cones for daytime vision, and how light modulates sodium channels and glutamate release.

Explore the amygdala's role in processing fear, emotions, and memories within the limbic system, shaping threat detection and fight-or-flight responses.

Explore the hippocampus, a limbic structure with two hippocampi in each hemisphere, critical for consolidating short-term memories into long-term and episodic memories, and for spatial navigation.

Explore the thalamus as the brain's relay station, linking motor and sensory signals to the cortex, and examine the hypothalamus' role in autonomic and endocrine homeostasis, plus brainstem functions.

Neuroplasticity describes the brain's ability to change and rewire by strengthening existing connections or forming new ones, enabling learning, memory, and recovery from brain injury.

Explore how neuroplasticity enables the brain to adapt and rewire after injury through learning and repetition, and how neurogenesis adds growth of new neurons.

Leverage neuroplasticity by learning to rewire the brain through practice, forming stronger neuron connections and faster signaling, so you become better and faster at what you learn.

Explore how attention, memory, language processing, higher order thinking, organizing, and applying drive learning, with memory systems from working to long-term memory and metacognition guiding practice.

Neuroplasticity drives brain change through learning, strengthening neural pathways and improving memory, language skills, and cognitive reserve, while bilingualism, reading, and musical training enhance cognitive flexibility and delay dementia.

Learning rewires the brain by strengthening connections and creating new pathways, while practice automates skills and improves performance even under distraction; sleep reinforces this learning and supports neuroplasticity.

Explore classical conditioning with Pavlov’s dog experiments, identifying conditioned and unconditioned stimuli, generalization, discrimination, extinction, and spontaneous recovery, and examine operant conditioning with reinforcement, punishment, and habits.

Explore how the brain, protected by the blood-brain barrier, uses water, lipids, proteins, carbohydrates, vitamins, minerals, and glucose to maintain function and homeostasis.

Engage in regular exercise to boost brain health, memory, and cognitive performance, reduce dementia risk, and promote neuroplasticity and neurogenesis via increased blood flow and BDNF.

Engage in aerobic and resistance exercise to boost neuroplasticity, hippocampal and cortical volumes, and cognitive functions, while variety, companionship, and a trainer-guided schedule enhance motivation and brain health.

Engage in diverse brain exercises—from physical activity and meditation to reading, music, and puzzles—to reduce stress, boost neuroplasticity, and strengthen cognitive reserve for better thinking and mood.

Laughing releases endorphins that boost mood and increase brain oxygen. Cultivate emotional resilience through meaningful conversations, sleep, hydration, and a Mediterranean diet with omega-3s to support memory and cognitive function.

Explore cognitive flexibility as the ability to switch tasks, adjust to environment, and manage attention and working memory, and relate it to stress, reading comprehension, creativity, problem solving, and aging.

The transtheoritical model outlines six stages of change, including contemplation, preparation or determination, action, maintenance, and termination, showing how consistency and repetition rewire the brain to form habits.

Explore the transtheoretical model of change and its processes, from consciousness raising and counter conditioning to reinforcement management, self evaluation, and social liberation, guiding behavior change.

Explore how intention precedes action through attitude, subjective norms, and perceived behavioral control, and how Bandura's social cognitive theory links learning to attention, retention, motivation, and self-efficacy.

Review and exercise reinforces understanding of neural structures and their functions from the fundamentals of neuroscience: structures and functions.

Explore how confirmation bias shapes beliefs and behavior, and learn strategies like self-awareness and seeking opposite data to reduce cognitive dissonance.

Demonstrate how neuroplasticity underlies cognitive flexibility, boosted by physical exercise, language learning, music practice, and varied experiences, with reflective thinking and mental representation enhancing creativity and executive functions.

Explore how mental representations link perception, memory, and visualization, while the structure-building framework uses mapping and sifting with enhancement and suppression to refine skills.

Explore cognitive flexibility within the fundamentals of neuroscience, understanding how brain structures support adaptive function and flexible thinking across tasks.

Explore cognitive reserve as the brain's resilience to damage, showing how education, bilingualism, musical training, cognitive training, and physical activity sustain neural networks to delay dementia.

Link conditioning theories to habits by showing learned behaviors in the brain formed through stress, boredom, and emotional fulfillment, and how positive outcomes strengthen habits like smoking.

Explore how habits form through trial-and-error learning and classical conditioning. Learn to break them gradually by replacing them with beneficial alternatives and avoiding triggers.

Explore the habit loop of cue, routine, and reward, and how triggers and dopamine-driven rewards shape behavior. Identify rewards, avoid or replace triggers, and change routines to break bad habits.

Examines how classical and operant conditioning drive habit formation, using smoking and stress relief; shows cue exposure and replacing bad habits with exercise to reduce cravings.