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Related Concept Videos

Vision01:24

Vision

Vision is the result of light being detected and transduced into neural signals by the retina of the eye. This information is then further analyzed and interpreted by the brain. First, light enters the front of the eye and is focused by the cornea and lens onto the retina—a thin sheet of neural tissue lining the back of the eye. Because of refraction through the convex lens of the eye, images are projected onto the retina upside-down and reversed.
Cranial Bones: Lateral View01:27

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The temporal bone forms the lower lateral side of the skull. The temporal bone is subdivided into several regions. The flattened upper portion is the squamous portion of the temporal bone. Below this area and projecting anteriorly is the zygomatic process of the temporal bone, which forms the posterior portion of the zygomatic arch. Posteriorly is the mastoid portion of the temporal bone. Projecting...
Anatomy of the Brain: Major Regions01:20

Anatomy of the Brain: Major Regions

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Cerebrum: Anatomical Overview I01:26

Cerebrum: Anatomical Overview I

The main and largest component of the human brain is the cerebrum. The cerebrum consists of two main parts: the cerebral cortex, an outer layer with wrinkles or folds known as gyri and shallow grooves called sulci, and a deeper region beneath it. The cerebrum divides into two distinct hemispheres and contains five different lobes: the frontal, parietal, temporal, occipital, and insula. The central sulcus separates the frontal and parietal lobes and two functionally important gyri — the...
Cerebrum: Anatomical Overview II01:11

Cerebrum: Anatomical Overview II

Each cerebral hemisphere can be divided into three main regions. The outermost region, the cerebral cortex, is a thin layer (2 to 4 millimeters thick) made up of gray matter, consisting of neuron cell bodies, dendrites, glial cells, and blood vessels. The middle region, or white matter, is primarily composed of myelinated nerve fibers organized into three types of large tracts: association fibers, commissures, and projection fibers. Association fibers connect different areas within the same...
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Three-dimensional head-direction coding in the bat brain.

Arseny Finkelstein1, Dori Derdikman2, Alon Rubin1

  • 1Department of Neurobiology, Weizmann Institute of Science, Rehovot 76100, Israel.

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|December 4, 2014
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This summary is machine-generated.

Mammals possess a three-dimensional (3D) sense of direction, utilizing head-direction cells for spatial navigation. This study reveals 3D head-direction mechanisms in bats, supporting complex aerial and terrestrial movement.

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Area of Science:

  • Neuroscience
  • Animal Behavior
  • Spatial Navigation

Background:

  • Mammalian navigation relies on a sense of direction, often attributed to head-direction cells.
  • The existence of a three-dimensional (3D) compass in mammalian brains remains largely unexplored.

Purpose of the Study:

  • To investigate the presence and nature of 3D head-direction cells in mammals.
  • To determine if mammalian brains can represent spatial orientation in three dimensions.

Main Methods:

  • Neural recordings were performed in bats during both crawling and flying behaviors.
  • Analysis focused on the tuning properties of head-direction cells in response to different head orientations (azimuth, pitch, roll).

Main Results:

  • Head-direction cells tuned to individual 3D angles (azimuth, pitch, roll) and their combinations were identified in bats.
  • A functional-anatomical gradient of 2D to 3D representations was observed in the presubiculum.
  • Neuron tuning shifts in inverted bats supported a toroidal coordinate system (azimuth × pitch) for 3D head direction.

Conclusions:

  • This study provides the first evidence for a 3D head-direction mechanism in mammals.
  • This 3D compass system likely facilitates complex spatial navigation in three-dimensional environments.