How Relationships Shape Your Brain | Dr. Allan Schore

From the last trimester of pregnancy through roughly age two to three, the right hemisphere is in a unique growth spurt and dominates brain function. During this window, the infant’s right brain — including amygdala, insula, cingulate, and autonomic circuits — is sculpted by the caregiver’s moment-to-moment regulation of arousal (up- and down-shifting between excitement and calm). These early patterns become the foundational templates for how we handle stress, novelty, and relationships throughout life.

Schore reframes attachment as the caregiver’s ongoing regulation of the infant’s emotional and bodily states via face, voice prosody, gesture, and touch. Secure attachment requires two elements: (1) psychobiological attunement (reading and matching the infant’s arousal and emotion) and (2) repair after inevitable misattunements. The infant internalizes these right-brain-to-right-brain regulatory exchanges, leading to robust strategies for both self-soothing (auto-regulation) and seeking co-regulation (interactive regulation).

In secure attachment, individuals can both self-regulate and seek others under stress or to share joy. Avoidant (dismissive) attachment leans almost entirely on auto-regulation and deactivates the attachment system — such people are uncomfortable with closeness and downplay emotional needs. Anxious attachment over-activates the attachment system and relies heavily on others to regulate, with poor self-soothing. Disorganized attachment involves failure of both systems; under stress, people may shut down the attachment system entirely through dissociation.

Schore estimates that 90–95% of the motivations underlying our behavior are unconscious and right-lateralized. The right hemisphere continuously processes emotional signals, safety cues, and stress at levels beneath awareness. It dominates the stress response, sympathetic and parasympathetic control, empathy, intuition, imagery, creativity, morality, spirituality, humor, music, and love. Our conscious, verbal left brain often rationalizes decisions already made by these right-brain processes.

Across modalities, what predicts change is not cognitive interpretation alone but the quality of the therapeutic relationship and the therapist’s capacity for emotional attunement. In-session, the therapist must ‘surrender’ out of narrow, left-brain listening into wide, right-brain attention — tracking the patient’s voice tone, face, gestures, and their own bodily sensations. Hyper-scanning studies show synchronization of right temporal–parietal regions between therapist and patient during emotionally charged moments; these brief, shared ‘heightened affective moments’ drive durable neural change in right-brain regulatory circuits.