Interoception in AuDHD: Research Review

Interoception -- the sensing of internal bodily signals -- is increasingly recognised as a core process underlying many of the difficulties experienced in autism, ADHD, trichotillomania, emotional dysregulation, and burnout. This review synthesises evidence across eight domains with direct relevance to a 37-year-old male with AuDHD, HFE iron overload, and Elvanse 70mg.

Evidence Rating Key
A = Systematic review / meta-analysis
B = Well-designed RCT or large cohort study
C = Controlled observational / small experimental study
D = Case report, narrative review, or theoretical paper

1. Interoception in Autism

The autism-interoception literature is dominated by a critical debate: is impaired interoception intrinsic to autism, or driven by co-occurring alexithymia?

Key Findings

Synthesis

The interoception-in-autism picture is nuanced. Approximately half of autistic individuals have alexithymia, and it is alexithymia -- the inability to identify and describe emotions -- that most consistently tracks with measurable interoceptive deficits. However, even autistic individuals without alexithymia show the accuracy-sensibility mismatch identified by Garfinkel et al. (2016): they over-report bodily sensations on questionnaires while performing poorly on objective heartbeat detection. This mismatch generates internal confusion that feeds anxiety and emotional dysregulation.

2. Interoception in ADHD

Key Findings

Synthesis: How ADHD Differs from Autism

In autism, the core problem is an accuracy-sensibility mismatch (poor detection, over-reporting). In ADHD, the profile is different: there appears to be reduced interoceptive accuracy but also altered automatic neural processing (elevated HEP), suggesting the brain registers signals but conscious access is disrupted by attentional deficits. The ADHD interoceptive profile likely relates to state regulation difficulties -- failing to monitor and adjust arousal in real time. In AuDHD, both mechanisms compound: the autistic mismatch plus the ADHD attentional gating problem creates a deeply unreliable internal signal environment.

3. Interoception and BFRBs / Trichotillomania

Direct interoception-trichotillomania research is sparse. The strongest evidence comes from the sensory phenomena / premonitory urge literature.

Key Findings

Synthesis: The Pre-monitory Urge Model

Trichotillomania involves a cycle: mounting internal tension (often poorly detected) -> urge -> pulling -> relief. The insula is the hub for both interoceptive processing and pre-monitory urge generation. If interoceptive accuracy is poor (as in AuDHD), the person may fail to detect the rising tension until it is overwhelming, at which point the pulling becomes the only available discharge. This "urge detection failure" model suggests that improving interoceptive awareness could lengthen the window between tension onset and pulling, enabling competing responses (as in habit reversal training). See Trichotillomania and Neurodevelopmental Links and Iron and OCD-Spectrum Repetitive Behaviours.

4. Interoception and Emotional Dysregulation

Key Findings

Synthesis

Interoception is the bridge between sensing and reacting. When internal states are poorly detected (low accuracy) or misinterpreted (high sensibility without accuracy), emotional responses become disconnected from their causes. The person may not recognise anger until they are shouting, not recognise sadness until they are crying, or not recognise stress until they are in crisis. In AuDHD, this is compounded by alexithymia (~50% prevalence in autism) and ADHD's impaired attentional gating. The result: emotions feel like they arrive "out of nowhere" at full intensity.

5. Interoception and Burnout Detection

Direct research linking interoception to burnout is extremely limited in the literature. No studies were found specifically examining interoception in autistic burnout. The evidence must be inferred from adjacent domains.

Key Findings

Synthesis

Burnout -- especially autistic burnout -- represents a catastrophic failure of internal monitoring. The person fails to detect accumulating exhaustion, cognitive overload, and physiological stress until a collapse threshold is crossed. This is precisely what poor interoceptive accuracy predicts: signals of fatigue, hunger, pain, and emotional distress are not registered until they become overwhelming. For someone with AuDHD, alexithymia, and HFE-related fatigue, this creates a dangerous pattern of push-crash cycling. See Fatigue and Burnout.

6. Interoception and Hunger / Satiety

Directly relevant to Elvanse 70mg appetite suppression.

Key Findings

Synthesis

For someone on Elvanse 70mg, appetite suppression is a pharmacological overlay on already-poor interoceptive hunger detection from AuDHD. The ADHD inattention-to-hunger cues pathway (Martin et al.) plus the alexithymic inability to recognise "what this body feeling means" creates a situation where meals are forgotten entirely, leading to crash eating when the medication wears off. Body scan interventions showing 18-minute earlier hunger detection (Palascha et al.) suggest a practical, low-cost intervention for this exact problem. See Elvanse and Mineral Metabolism.

7. Interventions to Improve Interoception

Key Findings

Synthesis: Intervention Recommendations for AuDHD

The evidence supports a graduated approach:

1. Body scan meditation (daily, 15-20 min) -- strongest evidence for improving interoceptive accuracy over 2-8 weeks (Fischer et al., Schwerdtfeger et al.)
2. Mindful Awareness in Body-Oriented Therapy (MABT) -- specifically designed for populations with interoceptive difficulties; scaffolds awareness progressively
3. Interoceptive exposure -- deliberately inducing and labelling body sensations (e.g., cold water on hands, brief exercise) to build detection skills
4. Hunger-specific body scans before meals -- single sessions already improve hunger detection by ~18 minutes (Palascha et al.)
5. MBSR programmes -- 8-week protocols alter salience network connectivity

Caution for AuDHD: Brief single-session interventions may be insufficient when alexithymia is present (Aaron et al.). Sustained daily practice over weeks is likely required. The ADHD attentional component means structured, guided audio exercises are preferable to unguided practice.

8. Iron, Inflammation, and Interoceptive Accuracy

Key Findings

Synthesis: The HFE-Interoception Connection

For someone with HFE hereditary haemochromatosis, this domain is critical. The mechanistic chain is:

1. HFE mutations -> chronic iron overload
2. Brain iron accumulation -> particularly in basal ganglia and cortical regions including the insula (Mosher et al., Nikolova et al.)
3. Iron-driven neuroinflammation -> elevated oxidative stress and myo-inositol (Salami et al.)
4. Insular cortex dysfunction -> impaired interoceptive processing (Mosher et al.; anterior insula is the primary interoceptive cortex)
5. Systemic inflammation -> further disruption of interoceptive circuits via immune signalling (Karshikoff et al., Quadt et al.)

This creates a biological substrate for interoceptive impairment that is independent of, and additive to, the neurodevelopmental interoceptive deficits of AuDHD. Iron management via venesection may therefore have direct benefits for interoceptive accuracy, beyond its metabolic effects. See Iron-Dopamine-ADHD Axis and Ferroptosis and Neuronal Iron.

Clinical Integration: The AuDHD-Interoception Model

                    ┌──────────────────┐
                    │  HFE Iron Overload │
                    │  (Brain iron,     │
                    │   inflammation)   │
                    └────────┬─────────┘
                             │
                             ▼
┌────────────┐    ┌──────────────────────┐    ┌────────────┐
│   Autism    │───▶│  IMPAIRED            │◀───│    ADHD    │
│ (accuracy- │    │  INTEROCEPTION        │    │ (attention │
│  sensibility│    │                      │    │  gating    │
│  mismatch) │    │  • Poor body signal  │    │  failure)  │
└────────────┘    │    detection          │    └────────────┘
                  │  • Misinterpretation  │
                  │  • Delayed awareness  │
                  └──────────┬───────────┘
                             │
              ┌──────────────┼──────────────┐
              ▼              ▼              ▼
     ┌────────────┐  ┌────────────┐  ┌────────────┐
     │ Emotional  │  │ Trichotillo│  │  Burnout   │
     │ Dysreg.    │  │ -mania     │  │  & Fatigue │
     │            │  │ (urge      │  │  (missed   │
     │ (emotions  │  │  detection │  │  exhaustion│
     │  arrive at │  │  failure)  │  │  signals)  │
     │  full      │  │            │  │            │
     │  intensity)│  │            │  │            │
     └────────────┘  └────────────┘  └────────────┘
              │              │              │
              ▼              ▼              ▼
     ┌──────────────────────────────────────────┐
     │  Elvanse 70mg: further suppresses hunger  │
     │  /satiety signals on already-poor         │
     │  interoceptive substrate                  │
     └──────────────────────────────────────────┘

Priority Interventions

1. Daily body scan practice (guided audio, 15-20 min) -- evidence-based for improving interoceptive accuracy within 2-8 weeks
2. Pre-meal body scan -- single-session evidence for improving hunger detection by ~18 minutes; critical given Elvanse appetite suppression
3. Timed eating schedule -- external scaffolding to compensate for unreliable internal hunger signals
4. Interoceptive labelling practice -- "what is my body feeling right now?" check-ins throughout the day
5. MABT or similar body-oriented therapy -- scaffolded approach for those with alexithymia and trauma history
6. Iron management -- venesection to reduce brain iron burden and associated neuroinflammation, potentially improving interoceptive accuracy at the hardware level

Research Gaps

• No published studies on interoception specifically in AuDHD (co-occurring profiles)
• No studies on interoception and autistic burnout
• Minimal research on interoception in trichotillomania specifically (extrapolated from OCD/tics)
• No studies on stimulant medication effects on interoceptive accuracy
• No direct HFE genotype / interoceptive accuracy studies
• Need for intervention trials of body scan/MABT in neurodivergent populations

Related Notes

• Late-Diagnosed Autism - Distinct Profile
• ADHD-PI and Internal Hyperactivity
• Trichotillomania and Neurodevelopmental Links
• Iron-Dopamine-ADHD Axis
• HFE Variants and Brain Iron
• Fatigue and Burnout
• Elvanse and Mineral Metabolism
• Iron and OCD-Spectrum Repetitive Behaviours
• Ferroptosis and Neuronal Iron