A new study published in Neurological Sciences reveals that observer dreams, where the dreamer watches events from a third-person perspective rather than participating, occur in roughly 12% of dreams reported by people with Parkinson’s disease, and their frequency is linked to motor symptom severity.
The Observer Dream Phenomenon
Most dreams feel like lived experience: you run, you speak, you react. But in observer dreams, you are a spectator. You see yourself or others moving through a scene without intervening. Although counterintuitive, this dream mode is well-documented in young, healthy populations, appearing in about 6-20% of dream reports. Until now, however, no one had systematically examined observer dreams in Parkinson’s disease (PD), a condition defined by progressive loss of motor control.
What the Study Found
Dr. Paulo Bugalho, a neurologist at Hospital de Egas Moniz in Lisbon and researcher at NOVA Medical School, collected 120 dreams via 15-day dream diaries from 24 Parkinson’s patients. The results:
- Eleven patients (45.8%) reported at least one observer dream during the diary period.
- Of the 120 total dreams, 14 (11.7%) were classified as observer dreams, a rate consistent with previous studies in younger, healthy individuals.
- Crucially, the relative frequency of observer dreams was negatively and significantly associated with motor function scores, particularly bradykinesia (slowness of movement).
In other words, patients with more impaired motor function, especially bradykinesia, tended to have fewer observer dreams.
What This Means
The finding at first seems paradoxical. You might expect that people who cannot move well in waking life would dream of being passive observers more often. Instead, the data suggest the opposite: worse motor function correlates with fewer observer dreams, meaning more active, participatory dreams despite physical limitation.
The authors propose that this may reflect a complex relationship between dream content and the neurodegeneration of motor circuits. The same basal ganglia and dopamine pathways that control movement are deeply involved in the generation of dream experience. Degradation of these circuits may alter how the brain represents the self in dreams, shifting the balance between the “acting self” and the “observing self.”
Parkinson’s and Dream Science
Parkinson’s disease has long been a rich window into sleep and dreaming. REM sleep behavior disorder (RBD), where people physically act out their dreams, is a well-known precursor to PD. This study adds another dimension: not just how patients act in their dreams, but from what perspective they experience them.
The findings support the “dream continuity hypothesis”, the idea that waking cognition and physical state shape dream content. But they also hint at something deeper: that the neural machinery of movement and the neural machinery of self-representation in dreams may be partly overlapping.
Source
Bugalho P. The frequency of observer dreams in Parkinson’s disease patients and relation with clinical variables. Neurol Sci. 2026 Jul 17;47(8):640. PMID: 42463548.