Brain Injury 101

Brain injury changes how the brain processes information, regulates emotion, manages energy, and communicates. Those changes can look very different from one person to the next, and they can be hard to recognize without clear, medically grounded language.

Every article in this section is written in plain English, grounded in peer-reviewed research, and built for caregivers, families, and individuals who need accurate information without having to wade through clinical jargon.

Robbins Nest Alliance articles are written by founder Heather Robbins and grounded in peer-reviewed research from sources including the National Institute of Neurological Disorders and Stroke, the CDC, and published neurological journals.

New to brain injury Caregiver at home Researching CTE Learning about FND Veteran or military family Parent of a child with concussion

Start here: what brain injury is and how it happens

The basics of traumatic brain injury, how symptoms develop, and why they are so often missed.

Concussion vs brain injury: what is the difference? Why brain injury symptoms are often missed early 6 early signs families notice first TBI symptoms: a complete guide 7 types of traumatic brain injury explained Post-Concussion Syndrome: what it is, why symptoms persist, and what families need to know Concussion recovery: what to expect and what actually helps Traumatic brain injury care: what helps Why neurological symptoms fluctuate Car accident brain injury: the invisible injury Brain injury and autoimmune disease
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Cognitive changes: thinking, memory, and processing

How brain injury affects memory, attention, decision-making, and the speed of thought.

Memory problems after brain injury Difficulty concentrating after brain injury Cognitive overload: why too much information overwhelms Why thinking feels harder after brain injury Reduced mental flexibility after brain injury Difficulty making decisions after brain injury Difficulty understanding information Delayed response time after brain injury Trouble following conversations after brain injury
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Emotional and behavioral changes

Why mood, anger, anxiety, and emotional regulation shift after neurological injury, and what drives those changes.

Emotional changes after brain injury Emotional blunting after brain injury Mood swings after brain injury Can brain injury affect empathy? Pseudobulbar affect (PBA) after brain injury Irritability after brain injury Why small things feel big after brain injury Anger after brain injury Anxiety after brain injury Depression after brain injury Apathy after brain injury Why brain injury causes emotional outbursts
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Physical symptoms: fatigue, sleep, and communication

How brain injury affects energy levels, sleep quality, speech, and physical function.

Why brain injury causes fatigue Sleep problems after brain injury Word finding difficulty after brain injury What causes personality changes? Can trauma affect memory? What families see
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Chronic Traumatic Encephalopathy (CTE)

The science of repeated head impacts, CTE stages, symptoms, and what research currently shows about long-term brain changes.

What is CTE? Understanding chronic traumatic encephalopathy CTE symptoms: early warning signs The four stages of CTE How repeated head impacts can lead to CTE CTE vs dementia: what is the difference? CTE vs PTSD: why symptoms can look similar Do repeated hits to the head cause long-term brain damage? Why repeated hits matter even without a concussion
Full CTE learning path →

Sports, concussion, and head injury prevention

What athletes, parents, and coaches need to know about concussion risk, sports safety, and brain-protective activity.

Football head injuries and concussion prevention Head injuries in sports: what players and families need to know My child plays contact sports. Should I be worried? Sports that are good for the brain: what research says Youth sports and concussion: what the research shows How to tell if your child has a concussion What to do after your child hits their head: a parent's guide Return to school after concussion: what parents need to know Childhood concussion effects later in life Repetitive head impacts in sports: brain health across a lifetime
Full youth concussion hub →

Dementia and related neurological conditions

Vascular dementia, frontotemporal dementia, sundowning, PTSD overlap, and how brain injury intersects with progressive conditions.

Vascular dementia: what caregivers need to know Frontotemporal dementia: what caregivers need to know Sundowning in dementia: what caregivers need to know PTSD vs traumatic brain injury Brain injury and intimate partner violence: what the research shows IPV and TBI: why survivors are so often misdiagnosed
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Explore dedicated condition hubs

Condition hub

Functional Neurological Disorder

Symptoms, nervous system mechanisms, FND vs seizure disorder, and caregiver communication.

Explore FND → Condition hub

CTE and Repeated Head Impacts

The full CTE learning path from foundational science to caregiver support and veteran-specific research.

Explore CTE → Population hub

Youth and Pediatric Concussion

Concussion recognition, recovery protocols, return to school, youth sports risk, and long-term effects for children and adolescents.

Explore Youth Concussion → Population hub

Veterans and Military Families

TBI, blast exposure, PTSD overlap, CTE in veterans, and caregiver resources for military families.

Explore Veterans → Advanced education

The Nest Academy

Peer-reviewed deep dives for caregivers ready to go beyond the basics.

Explore Nest Academy →
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Latest Brain Injury Articles

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  • What Helps After a Concussion?

    What Helps After a Concussion?

    What helps after a concussion? Learn what to do, what to avoid, when to get help, and how to support recovery with clear, practical steps.

    What Helps After a Concussion?

    What helps after a concussion? Learn what to do, what to avoid, when to get help, and how to support recovery with clear, practical steps.

  • Brain Injury Behavior Change Examples

    Brain Injury Behavior Change Examples

    Brain injury behavior change examples can explain anger, apathy, impulsivity, and confusion so caregivers can respond with clarity and calm.

    Brain Injury Behavior Change Examples

    Brain injury behavior change examples can explain anger, apathy, impulsivity, and confusion so caregivers can respond with clarity and calm.

  • A teenager studying at a desk with books open, looking focused, in a warm home environment

    Childhood Concussion Effects Later in Life

    Most childhood concussions resolve fully within weeks. A subset of children, particularly those with multiple concussions or prolonged recovery, experience effects that persist into adolescence and adulthood. This article reviews...

    Childhood Concussion Effects Later in Life

    Most childhood concussions resolve fully within weeks. A subset of children, particularly those with multiple concussions or prolonged recovery, experience effects that persist into adolescence and adulthood. This article reviews...

  • Young soccer player in uniform on a grass field, looking toward the camera, with teammates visible in the background

    Youth Sports and Concussion: What Parents Need ...

    Concussion is the most common brain injury in youth sports and one of the most frequently underreported. This guide covers concussion rates by sport, why young athletes hide symptoms, what...

    Youth Sports and Concussion: What Parents Need ...

    Concussion is the most common brain injury in youth sports and one of the most frequently underreported. This guide covers concussion rates by sport, why young athletes hide symptoms, what...

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