Suprachiasmatic nucleus
E873098
The suprachiasmatic nucleus is a small region in the hypothalamus that serves as the body’s master circadian clock, synchronizing daily physiological and behavioral rhythms such as the sleep–wake cycle.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Suprachiasmatic nucleus canonical | 1 |
| suprachiasmatic nucleus | 1 |
| ventrolateral SCN | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T10582902 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Suprachiasmatic nucleus Context triple: [Sleep, regulatedBy, Suprachiasmatic nucleus]
-
A.
locus coeruleus
The locus coeruleus is a small brainstem nucleus that is the primary source of norepinephrine in the brain and plays key roles in arousal, attention, and stress responses.
-
B.
reticular nucleus of thalamus
The reticular nucleus of the thalamus is a thin shell of inhibitory (GABAergic) neurons surrounding the thalamus that regulates thalamocortical signaling and plays a key role in attention and sleep rhythms.
-
C.
thalamus
The thalamus is a deep brain structure that acts as a central relay hub, processing and transmitting sensory and motor information to the cerebral cortex and playing key roles in consciousness, sleep, and attention.
-
D.
lateral geniculate nucleus
The lateral geniculate nucleus is a relay center in the thalamus that processes visual information from the retina before it reaches the primary visual cortex.
-
E.
inferior colliculus
The inferior colliculus is a midbrain auditory center that integrates and relays sound information from lower brainstem nuclei to higher brain regions involved in hearing.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Suprachiasmatic nucleus Target entity description: The suprachiasmatic nucleus is a small region in the hypothalamus that serves as the body’s master circadian clock, synchronizing daily physiological and behavioral rhythms such as the sleep–wake cycle.
-
A.
locus coeruleus
The locus coeruleus is a small brainstem nucleus that is the primary source of norepinephrine in the brain and plays key roles in arousal, attention, and stress responses.
-
B.
reticular nucleus of thalamus
The reticular nucleus of the thalamus is a thin shell of inhibitory (GABAergic) neurons surrounding the thalamus that regulates thalamocortical signaling and plays a key role in attention and sleep rhythms.
-
C.
thalamus
The thalamus is a deep brain structure that acts as a central relay hub, processing and transmitting sensory and motor information to the cerebral cortex and playing key roles in consciousness, sleep, and attention.
-
D.
lateral geniculate nucleus
The lateral geniculate nucleus is a relay center in the thalamus that processes visual information from the retina before it reaches the primary visual cortex.
-
E.
inferior colliculus
The inferior colliculus is a midbrain auditory center that integrates and relays sound information from lower brainstem nuclei to higher brain regions involved in hearing.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
brain nucleus
ⓘ
circadian pacemaker ⓘ |
| associatedWith |
jet lag
ⓘ
shift work disorder ⓘ |
| composedOf |
GABAergic neurons
ⓘ
arginine vasopressin neurons ⓘ vasoactive intestinal peptide neurons ⓘ |
| controls | circadian rhythms in mammals ⓘ |
| discoveredIn | 20th century ⓘ |
| dorsomedial SCNFunction | outputs circadian signals ⓘ |
| expresses |
BMAL1 gene
ⓘ
CLOCK gene ⓘ PER1 gene ⓘ PER2 gene ⓘ clock genes ⓘ |
| foundIn | mammals ⓘ |
| hasAbbreviation | SCN ⓘ |
| hasFunction |
master circadian clock
ⓘ
regulation of body temperature rhythms ⓘ regulation of feeding rhythms ⓘ regulation of hormone secretion rhythms ⓘ regulation of sleep–wake cycle ⓘ synchronization of circadian rhythms ⓘ |
| hasMechanism | transcription–translation feedback loops ⓘ |
| hasNameOrigin | Latin for "above the chiasm" ⓘ |
| hasResearchUse | model for circadian biology ⓘ |
| hasSubregion |
dorsomedial SCN
ⓘ
ventrolateral SCN ⓘ
linked to:
Suprachiasmatic nucleus
|
| isEntrainedBy | light–dark cycle ⓘ |
| lesionEffect |
abolition of circadian locomotor rhythms
ⓘ
disruption of sleep–wake cycle ⓘ |
| locatedAbove | optic chiasm ⓘ |
| locatedIn |
brain
ⓘ
diencephalon ⓘ |
| partOf |
anterior hypothalamus
ⓘ
linked to:
hypothalamus
hypothalamus ⓘ |
| projectsTo |
dorsomedial hypothalamic nucleus
ⓘ
paraventricular nucleus of the hypothalamus ⓘ pineal gland via multisynaptic pathways ⓘ subparaventricular zone ⓘ |
| receivesInputFrom |
intrinsically photosensitive retinal ganglion cells
ⓘ
retina ⓘ retinohypothalamic tract ⓘ |
| regulates |
chronotype
ⓘ
cortisol circadian rhythm ⓘ melatonin secretion ⓘ sleep timing ⓘ |
| usesSignal | melanopsin-based photoreception ⓘ |
| ventrolateral SCNFunction | receives photic input ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Suprachiasmatic nucleus Description of subject: The suprachiasmatic nucleus is a small region in the hypothalamus that serves as the body’s master circadian clock, synchronizing daily physiological and behavioral rhythms such as the sleep–wake cycle.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Suprachiasmatic nucleus
linked to: Suprachiasmatic nucleus