zona incerta

nucleus of the zona incerta

The zona incerta is a horizontally elongated region of gray matter cells in the subthalamus below the thalamus. Its connections project extensively over the brain from the cerebral cortex down into the spinal cord. Its function is unknown though several have been proposed related to 'limbic-motor integration' such as controlling visceral activity and pain; gating sensory input and synchronizing cortical and subcortical brain rhythms. Its dysfunction may play a role in central pain syndrome. It is also been identified as a promising deep brain stimulation therapy target for treating Parkinsons Disease. Its existence was first described by Auguste Forel in 1877 as a 'region of which nothing certain can be said'. A hundred and thirty years later in 2007, Nadia Urbain and Martin Deschênes of Université Laval noted that the 'zona incerta is among the least studied regions of the brain; its name does not even appear in the index of many textbooks. ' [WP,unvetted].

Tipo Bone
Estrutura pai nucleus of ventral thalamus
Nome latino nucleus of the zona incerta
FMA ID 62038

Perguntas frequentes

What is the zona incerta?
The zona incerta (ZI) is a horizontally elongated region of gray matter located in the subthalamus of the diencephalon, between the thalamic fasciculus above and the lenticular fasciculus below. It is a relatively understudied structure with diverse connections.
What connections does the zona incerta have?
The zona incerta has extensive connections spanning from the cerebral cortex to the spinal cord. It receives input from the motor and sensory cortex, superior colliculus, and spinal cord, and projects to the thalamus, hypothalamus, basal ganglia, brainstem, and spinal cord.
What functions have been proposed for the zona incerta?
Proposed roles for the zona incerta include limbic-motor integration, visceral activity regulation, pain gating, and attentional mechanisms. It has been implicated in rhythmic behaviors and may play a role in coordinating diverse forebrain functions.
How does the zona incerta relate to deep brain stimulation?
The zona incerta has emerged as a target for deep brain stimulation (DBS) in the treatment of tremor and Parkinson's disease, as it lies close to the subthalamic nucleus. Some studies report that stimulation of the posterior zona incerta region is effective for tremor suppression.
What is the etymological meaning of zona incerta?
The Latin name 'zona incerta' translates as 'uncertain zone,' reflecting the historical difficulty in defining its exact boundaries, subdivisions, and functional significance. Despite this ambiguity, it is now known to be an important integrative hub.

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Data sources: Terminologia Anatomica, Foundational Model of Anatomy, Wikidata.