Brain Facts (2018)

Neuroscience is rapidly advancing our understanding of the brain, nervous system, and behavior.
Key discoveries have been made recently, including:
- The Brain Prize 2017 for explaining the brain's learning and reward system, impacting understanding of compulsive behaviors and addiction.
- Nobel Prize for Medicine 2017 awarded for research on circadian rhythms, central to body clock functioning.
- The Brain Prize 2018 for insights into neurodegenerative diseases, like Alzheimer's and Parkinson's.
The Society for Neuroscience (SfN) emphasizes neuroscience literacy and public outreach.
Core Concepts of Neuroscience help understand fundamental principles:
- Information processing using circuits, inference, emotion, etc.

Human brain contains about 86 billion neurons.
Neurons exchange electrical signals to form circuits, which process information.
Neurons communicate through action potentials and neurotransmitters across synapses.
Excitatory neurons facilitate signaling while inhibitory neurons reduce signaling.

Plasticity is the brain's ability to adapt and reorganize itself based on experiences.
Neurons strengthen or weaken connections through synaptic changes, essential for learning and memory.

Cerebrum: Largest part, involved in thought, action, and interpretation.
Cerebellum: Coordinates movement and balance.
Hindbrain: Regulates basic life functions like breathing and heart rate.
Limbic System: Involves emotion and memory processing, includes structures like the amygdala and hippocampus.
- Amygdala: Processes fear and emotional responses.
- Hippocampus: Central to learning and memory formation.

Transduction: Sensory organs convert different stimuli into electrical signals.
Vision: Involves multiple layers and cells within the retina processing light information.
Auditory System: Converts sound waves into electrical signals in the cochlea.
Taste and Smell: Are chemical senses linked to survival.

Voluntary movements are coordinated by the motor cortex and executed by motor neurons.
Reflex actions are quick responses controlled by the spinal cord.
Skeletal muscles operate through antagonistic pairs (e.g., flexors and extensors).

Types of Memory:
- Declarative: Facts and events, divided into semantic (facts) and episodic (experiences).
- Non-declarative: Skills and habits, often developed unconsciously.
Memory is linked to structures in the brain such as the hippocampus, the prefrontal cortex, and regions involved in emotional memory.
Neurogenesis occurs in certain brain areas, allowing for the birth of new neurons throughout life.

Depression: Characterized by prolonged sadness and inability to enjoy life activities.
- Linked with neurotransmitter disruptions, particularly serotonin.
Anxiety Disorders: Include excessive worry, panic attacks, and PTSD, with roots in both biology and environment.
Schizophrenia: Involves distorted thinking and perception, often requiring complex treatment strategies.
Substance Abuse: Chronic disorder affecting brain function and behavior, necessitating various approaches for treatment.

Alzheimer's Disease: Progressive dementia characterized by neuronal damage, with plaques and tangles being notable indicators.
Parkinson's Disease: Affects movement, caused by dopamine neuron loss, requiring both medical and therapeutic approaches.
Amyotrophic Lateral Sclerosis (ALS): Characterized by the degeneration of motor neurons without cognitive impairment; research focuses on neuroprotective strategies.

Brain-Machine Interfaces: Allow individuals with severe disorders to control devices through neuronal activity.
Gene Editing Techniques: Such as CRISPR, aimed at correcting genetic anomalies underlying disorders.
Continued exploration of stem cell therapies and targeted drug treatments for various neurological conditions is underway.

Neuroscience offers exciting avenues for understanding the brain and addressing disorders that impact millions.
Ongoing research aims to translate findings into effective treatments and therapies to improve the quality of life.