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Related Concept Videos

Major Somatic Sensory Pathways01:28

Major Somatic Sensory Pathways

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Sensory impulses related to touch, pressure, vibration, and proprioception from various body parts, such as the limbs, trunk, neck, and posterior head, travel to the cerebral cortex through the posterior column-medial lemniscus pathway. The pathway’s name derives from the two white-matter tracts that convey the impulses: the spinal cord's posterior column and the brainstem's medial lemniscus. First-order sensory neurons extend their axons into the spinal cord, forming the...
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Overview of Somatic Sensory Pathways01:29

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Somatic sensory or somatosensory pathways refer to the neural pathways that carry information related to touch, pressure, pain, temperature, and proprioception from the skin, muscles, tendons, and joints to the brain. These pathways involve several stages of processing and integration of sensory information.
The somatosensory system is divided into three main pathways: the dorsal (or posterior) column-medial lemniscus, spinothalamic (or anterolateral), and spinocerebellar pathways.
The dorsal...
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Diencephalon: Thalamus and Information Relay01:27

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The thalamus, often called “the gateway to the cerebral cortex,” is vital in processing and directing sensory and motor signals throughout the brain. Almost all inputs destined for the cerebral cortex, except for olfactory signals, are relayed through the thalamus. The thalamus is  a sophisticated relay station, channeling information from various brain regions to the cerebral cortex, as well as a filter, prioritizing certain signals over others based on current physiological...
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Auditory Pathway01:15

Auditory Pathway

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Auditory pathways constitute the complex neural circuits responsible for transmitting and interpreting auditory information from the peripheral auditory system to the brain. Sound waves are initially captured by the outer ear, funneled through the ear canal, and reach the tympanic membrane (eardrum). These vibrations are transmitted via the middle ear's ossicles to the inner ear's cochlea.
When viewed cross-sectionally, the cochlea reveals the scala vestibuli and scala tympani flanking...
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Diencephalon: Anatomical Regions01:30

Diencephalon: Anatomical Regions

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The diencephalon, etymologically translated as 'through brain,' plays an integral role as the conduit between the cerebrum and the vast extent of the nervous system. However, the olfactory system is an exception, as it interfaces directly with the cerebrum. The diencephalon, deeply ensconced beneath the cerebrum, primarily consists of three paired structures — the thalamus, hypothalamus, and epithelamus. It also includes accessory structures such as the subthalamus, which houses the...
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Functional Brain Systems: Limbic System01:15

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The limbic system, often called the "emotional brain," is a complex set of structures located deep within the brain. The intricate network of the limbic system supports a wide range of psychological functions, from emotional regulation to memory formation and sensory processing. This functional brain region encompasses specific parts of the diencephalon and the cerebrum, integrating the higher mental functions of the cerebral cortex with the primitive emotional responses of the deep brain...
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Updated: Nov 26, 2025

Modification of a Colliculo-thalamocortical Mouse Brain Slice, Incorporating 3-D printing of Chamber Components and Multi-scale Optical Imaging
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Time to put the mammillothalamic pathway into context.

Christopher M Dillingham1, Michal M Milczarek1, James C Perry1

  • 1School of Psychology, Neuroscience and Mental Health Research Institute, Cardiff University, Cardiff, CF10 3AT, UK.

Neuroscience and Biobehavioral Reviews
|December 14, 2020
PubMed
Summary
This summary is machine-generated.

Damage to the mammillary body-anterior thalamic pathway severely impairs memory. This pathway is crucial for contextual and temporal processing, impacting hippocampal and neocortical functions.

Keywords:
AmnesiaAnterior thalamic nucleiDiencephalonHippocampusMammillary bodiesMemoryRetrosplenial cortex

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Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Neuroanatomy

Background:

  • The medial diencephalon, including mammillary bodies and anterior thalamic nuclei, is implicated in memory and amnesia.
  • The mammillothalamic tract connects the mammillary bodies to the anterior thalamic nuclei.

Purpose of the Study:

  • To investigate the critical role of the mammillary body-anterior thalamic axis in memory.
  • To elucidate the mechanisms underlying memory impairments following damage to this pathway.

Main Methods:

  • Review of animal models and patient studies involving lesions of the mammillary bodies, mammillothalamic tract, and anterior thalamic nuclei.
  • Analysis of electrophysiological and neural imaging data.

Main Results:

  • Lesions in this axis cause severe deficits in temporal and contextual memory.
  • Mammillothalamic projections influence thalamo-cortical and hippocampo-cortical interactions.
  • Damage disrupts behavioral performance in "where" and "when" processing tasks.

Conclusions:

  • The mammillary body-anterior thalamic pathway is essential for contextual and temporal memory.
  • This pathway may contribute to hippocampal and neocortical memory encoding, potentially via theta-generation in medial mammillary nuclei.