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Related Concept Videos

Amnesia01:13

Amnesia

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Amnesia is a condition marked by long-term memory loss, which impairs the ability to recall past events or create new memories.
The severity and duration of memory loss vary depending on the type and underlying cause. Amnesia is classified into two main types: retrograde and anterograde.
Retrograde amnesia is marked by the loss of memories formed before the onset of the condition. Patients may recall distant past events but often forget those occurring shortly before the incident.
Anterograde...
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Dissociative Amnesia01:21

Dissociative Amnesia

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Dissociative amnesia is a complex psychological condition that manifests as an inability to recall personal information, often tied to traumatic or stressful events. Unlike general amnesia, individuals with this condition retain the ability to perform routine activities and procedural tasks, such as operating a phone or navigating public transportation, yet experience profound gaps in autobiographical memory. These lapses may encompass significant life events, such as suicide attempts or...
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Lobes of the Cerebrum01:22

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The cerebral cortex, a critical structure of the brain, is intricately divided into two hemispheres, each consisting of four distinct lobes: occipital, temporal, frontal, and parietal. These lobes function cooperatively to regulate various cognitive and sensory functions, forming the basis of our complex neural capabilities.
Frontal lobe
The frontal lobes, located behind the forehead, are the command center of our brain, controlling personality, intelligence, and voluntary muscle movements....
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¹H NMR of Labile Protons: Temporal Resolution01:10

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Protons bonded to heteroatoms such as nitrogen and oxygen exhibit a range of chemical shift values. This is due to the varying degree of hydrogen bonding between the proton and the heteroatom in other molecules. The extent of hydrogen bonding affects the electron density around the proton, thereby giving different chemical shift values for the protons in the proton NMR spectrum.
The –OH proton in alcohols typically appears in the range of δ 2 to 5 ppm but can vary depending on the specific...
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Assessing Body Temperature - Temporal Artery01:19

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Here is a stepwise guide to assessing the body temperature at the temporal artery using a temporal artery thermometer
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Step 3: Assess the patient's...
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¹H NMR of Conformationally Flexible Molecules: Temporal Resolution00:52

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At room temperature, the chair conformer of cyclohexane undergoes rapid ring flipping between two equivalent chair conformers at a rate of approximately 105 times per second. These two chair conformers are in equilibrium. The rapid ring flipping results in the interconversion of the axial proton to an equatorial proton and an equatorial to the axial proton. Such interconversions are too rapid and cannot be detected on the NMR timescale. Hence, the NMR spectrometer cannot distinguish between the...
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Related Experiment Video

Updated: Feb 7, 2026

A Comprehensive Protocol for Manual Segmentation of the Medial Temporal Lobe Structures
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[Medial Temporal Lobe Amnesia].

Hirokazu Kikuchi1, Toshikatsu Fujii

  • 1Department of Neurology, Tohoku Medical and Pharmaceutical University.

Brain and Nerve = Shinkei Kenkyu No Shinpo
|July 13, 2018
PubMed
Summary
This summary is machine-generated.

The medial temporal lobe is crucial for declarative and long-term memory, particularly in memory consolidation. Studying amnesia in patients like H.M. helps understand these memory processes.

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Neurology

Background:

  • The medial temporal lobe's role in human memory was highlighted by patient H.M.'s severe amnesia after surgery.
  • Neuropsychological studies of H.M. led to memory classifications: declarative/non-declarative and short-term/long-term.
  • The medial temporal lobe is essential for declarative and long-term memory, and critical for memory consolidation.

Purpose of the Study:

  • To explore the function of the medial temporal lobe in human memory.
  • To investigate the psychological and neurological mechanisms of memory consolidation.
  • To understand how retrograde and epileptic amnesia inform memory consolidation processes.

Main Methods:

  • Analysis of neuropsychological data from patient H.M.
  • Review of studies on declarative and non-declarative memory.
  • Examination of retrograde amnesia and epileptic amnesia.

Main Results:

  • Established the medial temporal lobe as a key neural structure for memory.
  • Differentiated memory into declarative/non-declarative and short-term/long-term categories.
  • Confirmed the medial temporal lobe's role in memory consolidation.

Conclusions:

  • The medial temporal lobe is vital for forming and consolidating declarative and long-term memories.
  • Studying amnesia provides insights into the mechanisms of memory consolidation.
  • Further research into amnesia can elucidate psychological and neurological memory processes.