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September 3, 2026

How Does Trauma Affect The Nervous System?

Ami G. Risinger

Many of the more disruptive effects of psychological trauma result from dysfunction within your nervous system. How does trauma affect the nervous system, and what types of treatment can help?

At Time Wellness Tennessee, our approach to trauma treatment is built on an unwavering commitment to customized care, patient safety, and personal empowerment. 

Learn more about trauma treatment in Tennessee or verify your insurance now.

What Is Trauma?

To understand how does trauma affect the nervous system, you first need to understand what clinicians mean when they talk about trauma.

Trauma can refer to both physical and psychological harm:

  • Physical: From a medical perspective, trauma refers to physical damage such as lacerations or broken bones that were caused by incidents such as accidents, attacks, or violent weather.
  • Psychological: In a mental health context, trauma refers to ongoing psychological distress in the aftermath of a particularly terrifying or life-threatening event.

In today’s post, we’ll be primarily focusing on the psychological definition of trauma. Though this type of emotional pain is often associated with military combat, it can actually be triggered by a range of experiences.

Events that can cause psychological trauma include:

  • Child abuse or neglect
  • Physical attack
  • Sexual assault
  • Intimate partner violence
  • Automobile accidents
  • Serious illnesses
  • Tornadoes, hurricanes, and other natural disasters

The common thread among most trauma-inducing experiences is that they frequently cause a person to believe that they or a loved one are in imminent danger of dying and helpless to prevent it.

A person can develop psychological trauma after living through one or more of these types of events, witnessing them, or frequently being exposed to their aftermath (such as what fire fighters and EMTs often encounter).

Is Trauma the Same as PTSD?

Trauma and PTSD are similar, but they are not the same:

  • Trauma refers to how your mind and body respond during and after a life-threatening experience. These effects may linger for quite some time, but they will eventually subside.
  • Posttraumatic stress disorder (PTSD) is a mental health condition that can occur if your trauma persists and intensifies.

It can be helpful to think of trauma as your mind’s attempt to process or make sense of a particularly terrifying event or group of experiences. If your mind isn’t able to do this, one possible outcome is the development of PTSD.

How Does Trauma Affect the Nervous System?

Trauma can affect how you think, feel, and act. Some of the more disruptive of these effects are due to its impact on parts of your nervous system. How does this happen? How does trauma affect the nervous system? 

Though we often think of the nervous system as a single entity, it is actually made up of several distinct parts.

The two main components of your nervous system are:

  • Central: Your central nervous system (CNS) consists of your brain and spinal cord.
  • Peripheral: Your peripheral nervous system includes the nerves that connect your spinal cord with the other parts of your body.

From a functional perspective, your nervous system can be divided into two parts:

  • Somatic: This part controls voluntary actions such as movement and sensory perceptions. When you smell freshly baked cookies and walk into the kitchen to get some, both of those actions involve your somatic nervous system.
  • Autonomic: This part is responsible for involuntary processes such as your heartbeat, glandular functions, and digestion. Once those cookies pass from your mouth into your esophagus, your autonomic nervous system takes over.

The autonomic system can be further subdivided into two parts:

  • Sympathetic: Also referred to as your “fight or flight” response, your sympathetic nervous system kicks into action when your body perceives a threat. Effects include redirected blood flow, diminished sensitivity to pain, increased energy and perspiration, and more rapid breathing.
  • Parasympathetic: The sympathetic nervous system controls your “rest and digest” functions. Once the threat that activated your sympathetic nervous system has been defeated or evaded, your parasympathetic system begins to calm your body and mind.

Effects on the Sympathetic Nervous System

Trauma can prevent your parasympathetic nervous system from counterbalancing your sympathetic system once you’re no longer in immediate danger. This, in essence, causes your sympathetic nervous system to become stuck in the on position.

When trauma causes overactivity within your sympathetic nervous system, effects can include:

  • Anxiety: Excessive, disproportionate fear and worry
  • Hypervigilance: The sense that you are always in danger
  • Exaggerated startle response: Reacting to sudden movements or other stimuli in an overly intense or aggressive manner
  • Restlessness: Feeling jittery, jumpy, or perpetually on edge
  • Tension: Including muscle pain (often in your back and shoulders), headaches, and repeatedly clenching your jaw
  • Disrupted sleep: This may involve difficulty getting to sleep, intense nightmares, and a lack of deep, sustained sleep
  • Exhaustion: Even if you’re able to get to sleep, the many other effects on this list can cause you to become easily fatigued or exhausted

How Is Trauma Treated?

Trauma treatment can occur in several environments and involve a range of therapies and support services. 

Factors that providers must take into account when developing a person’s treatment plan include the type and severity of their symptoms, how these symptoms have affected their life, if they have PTSD or another mental health disorder, and if they have been attempting to self-medicate with alcohol or other addictive substances.

Levels of Care

One of the first decisions regarding a person’s treatment plan is identifying which types of programs can offer the structure and support they need.

From most to least restrictive, level-of-care options include:

Types of Therapy

Depending on their specific needs and which level they are currently enrolled in, trauma patients may take part in therapies such as:

Trauma patients may also benefit from medication management services to ease certain physical and psychological symptoms. 

There’s no level of care or set of services that are perfect for every person whose life has been disrupted by the effects of trauma. This is why it is so valuable to find a provider who will take the time to understand the full scope of your needs, the use that information to develop a customized plan that aligns with your goals and preferences.

Find Trauma Treatment in Tennessee

Time Wellness TN offers a full continuum of personalized care to help adults who have been living with PTSD or other effects of trauma. We also serve clients with co-occurring addictions and other mental or behavioral health concerns. 

Treatment options at our centers in Taft and Chattanooga, TN, include residential care, PHP, IOP, OP, and virtual (online) rehab. 

Call 423-413-6195 today to learn more or verify your insurance now.