🧵 1/ This is the mu-opioid receptor 🧵
It plays a crucial role in attachment, reward, social bonding and pain.
🚀Understanding Borderline Personality Disorder (BPD) as an Interpersonal Pain Syndrome 👇 1/ BPD and Pain Sensitivity: Evidence shows that individuals with BPD often present atypical pain responses, with up to 80% displaying reduced pain perception during non-suicidal self-injury (NSSI) episodes.
This phenomenon may stem from opioidergic system dysregulation, where neurobiological shifts alter pain processing in the brain.

1/ 🧵 This is your amygdala! It’s tiny-about the size of a shelled peanut at 1.24 cubic cm.

It’s the central hub of stress and trauma responses.
PTSD is one expression of the amygdala’s influence over cognitive, emotional, and behavioural domains
BUT
there’s more to it: the amygdala connects to the autonomic nervous system, hormonal systems inflammatory and even pain pathways.

So, let's explore some key aspects of PTSD 👇 2/ PTSD is diagnosed by symptoms across 4 clusters:

1. Intrusion phenomenon
2. Avoidance
3. Alterations in Cognition and mood
4. Alterations in Arousal and reactivity

The Gut-Brain Axis in Play: When Psychiatrists Treat Constipation 💩🚀 🧵1/

How I use Constipation as a Clinical Diagnostic and Management Marker ✅👇

One of the most fascinating aspects of treating depression is the intricate link between mood and the bowels.

Constipation is a very common symptom in severe melancholic and psychotic depression! ( >association with psychotic depression)

So, two things happen

1. Constipation

2. ‘Worry about constipation’ - this phenomenologically is not anxiety but is often misdiagnosed as such.

Note I am not referring to cases where addressing constipation improves mental state, treats confusion.

I’m talking about cases where long standing treatment of constipation has not shifted the bowels.

Phenomenology 👉As part of phenomenological evaluation -

I ask, "What proportion of your day do you think about this?" the answers are often 70%, 80%, even 90% of the day.

This ‘all consuming’ nature is not just anxious preoccupation BUT rather moving toward overvalued ideation. 🔥

But as clinicians, we must dig deeper-
financial ruminations, obsessional guilt, or pervasive feelings of doom are often present as well. ✅

How do we conceptualise this presentation in clinical practice and can it guide treatment? Absolutely! 1/ 👇 The answer lies in the gut-brain axis, a key player in this clinical scenario.

So what are the links between the Gut and the Brain in this scenario?

1️⃣Dopaminergic Dysfunction:
Did you know that dopamine, plays a crucial role in bowel motility?

In fact, guess which symptom often occurs early in Parkinson’s disease? That’s right-constipation.

Dopamine plays an important role in intestinal homeostasis.

Dopamine receptors, including D1, D3, and D5, are distributed in the intestinal wall- not just in the mucosa but also in the nerve endings of the intestinal wall.

Dopamine D2 receptors, are located specifically in the nerve endings within the intestinal wall. Meanwhile, the D4 receptor is found only in the mucosal layer.

When dopamine deficit states occur as in severe depression ( or many neuroinflammatory states) this can lead to reduced gut motility, resulting in constipation.

Thus , by enhancing dopaminergic activity through specific treatments, we can often see improvements in both the depression construct and bowel function. ✅

2️⃣Noradrenergic pathways :

The autonomic nervous system (ANS), which controls involuntary bodily functions like digestion, also plays a role in this process.

The noradrenergic descending pathway from the brain influences gastrointestinal motility by acting on the lumbosacral spinal defecation center.

In severe depression, ANS dysfunction may contribute to constipation, and addressing this requires a delicate balance- reducing agitation while potentiating NA to promote ANS homeostasis. 2/

The Law of Rare Events: The Suicide Prediction Paradox
Prompted by the discussion around ADs and suicide prevention and predicting suicide in general- i.e. preventing suicide events and the misunderstanding of probability. 🧵 1/ 👇
#SuicidePrevention #Psychiatry #MentalHealth Imagine we had a nearly "perfect" test to predict suicide – with 99% sensitivity and 99% specificity. Perfect right?
Well....not really!

Let's look at the surprising reality of what such a test might actually do.

First, some definitions:

Sensitivity: The ability of a test to correctly identify individuals who will suicide (true positives TP).

Specificity: The ability of a test to correctly identify individuals who will not suicide (true negatives TN).2/

🌟A Neuroscientific Voyage from Learned Helplessness to Depression 🌟

Here's a summary of my talk as an invited speaker at the Sri Lanka Psychiatry Conference / SAARC, taking the audience on a journey from learned helplessness to the complex realms of depression. 1/ 🧵 1. The Voyage to the 1960s: Was Learned Helplessness Truly Learned?

Seligman and Maier’s experiments demonstrated in animals how uncontrollable stress leads to passivity/anxiety and a cascade towards hopelessness.

Dogs subjected to inescapable shocks showed behaviours mirroring human responses to chronic stress-reduced aggression, social dominance, and exploration, along with heightened anxiety.

Below is a 10-minute video that sets the foundation for the key principles and stages of the Default Mammalian Response to Stress!

🧠 Addiction Psychiatry: The Power of Salience 🚀 🧵

1/ In psychiatry, addiction isn't just about substances like alcohol or cannabis.

It's about the brain's response to what's most "salient." 2/ Salience is what the brain finds most attention-grabbing.

When one stimulus dominates, a cascade of addiction-related behaviors can follow.

A shift from liking to wanting to seeking .

🧵 Twitter Thread: #AKATHISIA Important Points on Akathisia
🧠
1. Akathisia, derived from the Greek word "akathemi," refers to a compelling urge to move, often accompanied by a sense of inner restlessness.

2. Objective restlessness often leads to identification however 1/ 3. Subjective restlessness is equally distressing & Clinicians must rule out subjective restlessness and promptly address it, as akathisia is linked to an increased risk of suicide.

Weighing into the the ongoing debate on the existence of ADHD. Strange to me. Labels can always be debated and disproven but the underlying neuroscience ( may be incomplete) but not so easily disproved. So let's get back to neuroscience to understand #ADHD. 🧵👇 In order to understand ADHD, we need to look at the three main brain functions
1. Cognition
2. Movement & action and
3. Reward sensitivity. 1/

Relevance to GPs & psychiatrists in 🇦🇺 [webinar open for all HPs]. Up to 1/2 of patients w #longCOVID could be described as meeting criteria for CFS. Approximately 10 million Australians have had confirmed SARS-CoV-2 infection with long-term sequelae only now being defined ...1/

https://twitter.com/sanilrege/status/1623266618167160839

"To prepare the next generation of health-care providers and researchers, medical schools must improve their education on infection-initiated illnesses such as long COVID and ME/CFS, and competency evaluations should include these illnesses. [Davis et al, 2023]

Amazing news this evening! The Neuropsychiatry of Chronic Fatigue Syndrome & #LongCovid - A Practical Guide is accredited for CPD by the RACGP (7.5 hrs) over 3 evenings. Self-accreditation for psychiatrists (7.5 hrs). Coming up in May! #ChronicFatigueSyndrome #LongCovid #meded Day 1
✅Neuropsychiatry of Chronic Fatigue Syndrome
✅Pathophysiology of Chronic Fatigue Syndrome
✅ Clinical Assessment of Chronic fatigue syndrome
✅Management principles in Chronic fatigue syndrome
✅Clinical Case Study part 1 – Diagnostic aspects

The study on escitalopram v placebo in healthy volunteers measuring reinforcement sensitivity has caused a stir as usual with incorrect interpretations of ‘SSRIs blunt emotions’This is incorrect - let us understand reinforcement sensitivity 🧵👇 Keeping it simple -Humans utilise the limbic network (Amygdala-Ventral striatum) & PFC to respond to stimuli & make decisions leading to actions. Reinforcement learning / reward learning helps us solve problems. Reward does not only mean pleasure. Removal of a ‘problem’ =reward

Grab a cup of Adenosine antagonist 👉 long one,but this one will leave you amazed to learn about the wonders of our 🧠 (the anti-psychs who think monoamines (including 5-HT) don't play a role may have nightmares) (pardon the pun) 🧵 some key points 👇 psychscenehub.com/psychinsights/… The sleep-wake cycle is regulated by 1. Circadian process 2. Homeostatic process
Special retinal cells modulate Dopamine (DA) & melatonin release (sleep hygiene interventions) - Blue light 👇melatonin.
Sleep pressure linked to adenosine (AD) accumulation - ⬆️activity 👉⬆️AD

Since 5-HT is all the rage - Here are some antidepressants that do not act via SERT blockade. Antidepressants are not a homogeneous group. Most commonly those that put them under one umbrella have a anti-med agenda. So let's get started 👇 1. Agomelatine - 5 HT2C antagonist & Melatonin R agonist. ⬆️DA&NA in PFC. Melatonergic potentiation - ⬆️SWS psychscenehub.com/psychinsights/…

With 1-way ideologies (the chemical imbalance) I find one rule useful. As Taleb says (finance) don't ask a person what their opinion or reco is - ask them what's in their portfolio. So @markhoro @joannamoncrieff @HengartnerMP-how do you treat depression? Do u prescribe SSRIs? 1/n Do you prescribe antidepressants that directly or indirectly act on serotonin receptors. If you prescribe ADs how do you explain this to the patient. @markhoro you in detail explain withdrawal Sx neurobio- how do you Rx dep in your practice? 2/n