Whole brain volume

What is whole brain volume and functioning?
Investigation of whole brain anomalies considers the collective volume of the entire brain in structural imaging, without considering regionally specific differences in the volume of any individual structures. Alternatively, whole brain imaging can also consider overall grey matter or white matter volume. Whole brain functioning assesses the degree of connectivity across multiple brain regions.
What is the evidence for whole brain volume and functioning?
Structural changes
Moderate quality evidence found lower brain weight in people with schizophrenia compared to controls. Moderate to low quality evidence found male patients who died by suicide had significantly heavier brains than male patients who died of natural causes. Increased male brain weight was associated with younger age of schizophrenia onset.
Moderate to high quality evidence found people with schizophrenia who were medicated or not medicated showed reductions in intracranial, whole brain grey and white matter, and total brain volume compared to controls. Cortical volume was reduced only in medicated patients. People with first-episode schizophrenia also showed reduced intracranial, whole brain, and grey matter volume. First-degree relatives of people with schizophrenia showed reduced total grey matter volume compared to controls, with no differences in white matter or whole brain volume.
Functional changes
Moderate quality evidence found decreased local organisation and small-worldness (balance of local organisation and global integration) in people with schizophrenia. There was reduced connectivity within the default network (self-related thought), the affective network (emotion processing), the ventral attention network (processing of salience), the thalamus network (gating information) and the somatosensory network (sensory and auditory perception). There was reduced connectivity between the ventral attention network and the thalamus network, the ventral attention network and the default network, the ventral attention network and the frontoparietal network (external goal-directed regulation), the frontoparietal network and the thalamus network, and the frontoparietal network and the default network. There was increased connectivity between the affective network and the ventral attention network.
October 2020
Fact Sheet Technical Commentary
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Post-Traumatic Stress Disorder Library
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Schizophrenia Library
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Side effects
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Therapies
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Physical
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Risk factors and antecedents
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Antecedents
- Attention dysfunction
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Non-genetic risk factors
- Adult life events
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- Genetic and non-genetic risk
- Infectious agents
- Latitude, climate and winter birth
- Marital status
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- Maternal illness during pregnancy
- Migration
- Obstetric complications
- Parental age at birth
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- Parental psychological factors
- Sex differences
- Sibship
- Social capital
- Socioeconomic status
- Substance use
- Traumatic brain injury
- Urban environment
- Genetic risk factors
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Antecedents
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Illness course and outcomes
- Absconding
- Age at onset
- Childhood and early-onset schizophrenia
- Creativity
- Criminal offending, aggression and violence
- Criminal victimisation
- Cultural differences
- Diet
- Drug and alcohol use
- Duration of untreated psychosis
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- Electronic device use
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- First-episode psychosis
- Functional outcomes
- Homelessness
- Hope
- Late-onset schizophrenia
- Loneliness
- Mortality
- Parenthood
- Pathways to care
- Physical activity
- Physical health monitoring
- Psychotic relapse
- Quality of care
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- Sex differences
- Smoking
- Stigma and attitudes towards mental health
- Suicide and self-harm
- Treatment adherence
- Treatment-resistance
- Insights for families
-
Physical features
-
Functional changes
- Body functioning
-
Biochemical changes
- Brain pH and lactate
- cAMP
- Cholesterol
- Dopamine
- Endocannabinoids
- GABA
- Hormonal changes
- Hypothalamic-pituitary-adrenal axis
- Infectious agents
- Inflammation and the immune system
- Lipids
- Melatonin
- Melatonin
- Neurometabolites
- Neuropeptides
- Neurotrophins
- Nitric oxide
- NMDA receptor function
- Oxidative stress
- S100 Proteins
- Serotonin
- Synaptic proteins
- Trace elements
- Vascular endothelial growth factor
- Vitamin B
- Vitamin D
- Cerebral blood flow and metabolism
- Electrophysiology
- Structural changes
- Brain regions
-
Functional changes
-
Co-occurring conditions
- Mental disorders
-
Physical disorders
- Auditory system dysfunction
- Autoimmune diseases
- Blood disorders
- Cancer
- Cerebrovascular disease
- Dementia
- Dental disease
- Diabetes
- Digestive disorders
- Epilepsy
- Heart disease
- Infectious diseases
- Metabolic syndrome
- Musculoskeletal and connective tissues
- Obesity
- Optical alterations
- Peripheral vascular disease
- Polycistic ovary syndrome
- Postoperative complications
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- Respiratory system dysfunction
- Sexual dysfunction
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- Sleep apnea
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Podcast Library
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