Nervous System

The nervous system is an organ system containing a network of specialized cells called neurons that coordinate the actions of an animal and transmit signals between different parts of its body. In most animals the nervous system consists of two parts, central and peripheral. The central nervous system contains the brain and spinal cord.

Cancer and the Nervous System: Tumor Growth, Metastasis, and Neurobiology

Cancer neuroscience reveals a bidirectional relationship in which neural circuits, neurotransmitters, neurotrophic factors, and immune signaling can shape tumor growth, invasion, and metastasis. Tumors can, in turn, remodel nerves and exploit neural pathways, creating new opportunities and challenges for cancer therapy.

What are Schwann Cells?

Pathology of the Nervous System

What is the Nervous System?

Bioelectronic Medicine: Hacking Nervous System Signals for Therapeutic Benefits

The Impact of Hormones on the Nervous System

Development of the Nervous System

Function of the Nervous System

Latest Nervous System News and Research

Study highlights drop in harmful medication use among adults with cognitive disorders

Adults 65 and older with cognitive disorders such as dementia, are more likely to suffer negative effects from drugs that treat central nervous system conditions including anxiety, sleep problems and psychosis.

17 Sep 2026

Existing anti-seizure drug slows the growth of diffuse midline gliomas

An existing anti-seizure drug slows the growth of a devastating group of childhood cancers, new Stanford Medicine-led research has shown.

17 Sep 2026

Military blast exposure associated with long-term health conditions

Exposure to high-level blasts from incoming explosive devices or land mines among military veterans is associated with an increased risk of several conditions such as seizures, neuropathy and stroke years later, according to a study published September 16, 2026, in Neurology, the medical journal of the American Academy of Neurology.

16 Sep 2026

Shatavari may affect more than hormones, and the gut could help explain why

A review in Nutrients examined how bioactive compounds in Asparagus racemosus (Shatavari) may influence cognitive health through the microbiota-gut-brain axis, estrogen-related signaling, neuroinflammation, oxidative stress, and neurotransmitter regulation. Evidence from computational, cellular, animal, and limited human studies suggests several plausible biological pathways, but key questions remain about bioavailability, brain exposure, dosing, and clinical efficacy.

16 Sep 2026

Cold plunges may boost your mood, but the evidence is still on thin ice

A Molecular Psychiatry review examined evidence linking cold exposure with mood and mental health outcomes, alongside proposed roles for catecholamines, the HPA axis, and immune-inflammatory pathways. Early studies report short-term mood improvements and physiological changes, but clinical evidence remains limited, and the proposed mechanisms have not been established as drivers of lasting psychiatric benefits.

16 Sep 2026

Genetic discovery offers clues for repairing damaged neural connections

A new discovery by neuroscientists at Brown University's Carney Institute for Brain Science challenges long-held beliefs in neurobiology about how neurons extend axons to reach their targets.

15 Sep 2026

KAIST team uncovers how neurons deliver RNA to distant regions

Much like a courier reading an address on a package, neurons must deliver RNA to the precise locations where it is needed.

15 Sep 2026

Zidesamtinib shows strong activity in TKI-naive ROS1-positive non-small cell lung cancer

New results from the global Phase I/II ARROS-1 trial showed clinically meaningful activity with zidesamtinib in patients with advanced or metastatic ROS1-positive non-small cell lung cancer (NSCLC) who had not previously received a tyrosine kinase inhibitor (TKI).

15 Sep 2026

A large US study found no overall link between fluoride in pregnancy and children’s behavior

A US cohort study of 5,520 children found no overall association between prenatal exposure to fluoride in public drinking water and internalizing or externalizing behavioral problems across the primary analyses. Exploratory analyses identified some associations with externalizing problems at higher fluoride concentrations and in certain subgroups, but the researchers said these findings require further investigation.

13 Sep 2026

New dendritic constrictions reveal hidden complexity in neuronal signaling

Neurons receive thousands of signals via tree-like extensions called dendrites. Until now, these dendrites were thought to be relatively smooth cables that conduct electrical signals to the cell body.

11 Sep 2026

Aging brain actively shapes biology and progression of tumors

Brain tumors develop within an organ that changes substantially with age. A new review in Ageing and Cancer Research & Treatment examines evidence that the aging brain microenvironment may influence brain tumor progression, treatment resistance, and cognitive outcomes.

10 Sep 2026

Early B-cell therapy linked to better MS disease control

For people recently diagnosed with multiple sclerosis (MS), early treatment choices were associated with only slight differences after two years, based on the first treatment they used, according to a study published September 9, 2026, in Neurology Open Access, an official journal of the American Academy of Neurology.

9 Sep 2026

Gut infection leaves long-lasting immune ‘memories’ at the brain’s borders in mice

In mice, intestinal infections reshaped dural CD4+ T-cell populations and seeded the brain’s outer meningeal border with antigen-specific memory cells that persisted for months and mounted rapid recall responses to bloodborne antigens. Oral priming was associated with reduced Salmonella spread to the brain and modest cross-protection in an engineered shared-antigen Candida model, although the researchers could not definitively prove that dural CD4+ T cells alone caused the protection.

9 Sep 2026

Deep sleep brain activity helps mice resist social stress

Most adult sleep is non-rapid eye movement (REM), which is restorative and promotes resilience to stressful conditions. However, the brain mechanisms for non-REM sleep's relationship to stress resilience remain unclear.

7 Sep 2026

Atherosclerosis qualifies as an autoimmune disease

A new study in mice and patients shows that atherosclerosis meets the criteria for an autoimmune disease.

7 Sep 2026

Autoimmune diseases form distinct genetic clusters, study finds

Different autoimmune diseases often share genetic risk factors, but not through a single common genetic vulnerability.

4 Sep 2026

Crucial brain stem cells rely on metabolic pathways to make decisions

As the human brain takes shape before birth, a remarkable type of stem cell helps give it many of the features that make it distinctly human.

4 Sep 2026

Brain-protecting immune cells may actually drive Alzheimer's disease

Immune cells that normally protect the body from damage by attacking foreign or infected cells are found in the brains of patients with Alzheimer's disease and related disorders at much higher levels than in healthy brains.

3 Sep 2026

Immigrants face longer ICU stays after stroke in Canada

Among people who have a stroke in Canada, immigrants were admitted to the intensive care unit (ICU) at similar rates as long-term residents or people who were born in Canada, but they were more likely to have longer stays in the ICU, according to a study published September 2, 2026, in Neurology, the medical journal of the American Academy of Neurology.

2 Sep 2026

Shared biological pathways may explain chronic fatigue across diseases

A shared biological secret that helps explain chronic exhaustion in conditions including long Covid and PTSD has been discovered by researchers at the University of East Anglia and Oxford BioDynamics.

2 Sep 2026