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Related Concept Videos

Long-term Depression01:05

Long-term Depression

Long-term depression, or LTD, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTD is the process of synaptic weakening that occurs over time between pre and postsynaptic neuronal connections. The synaptic weakening of LTD works in opposition to synaptic strengthening by long-term potentiation (LTP) and together are the main mechanisms that underlie learning and memory.
Long-term Depression01:03

Long-term Depression

Long-term depression, or LTD, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTD is the process of synaptic weakening that occurs over time between pre and postsynaptic neuronal connections. The synaptic weakening of LTD works in opposition to synaptic strengthening by long-term potentiation (LTP) and together are the main mechanisms that underlie learning and memory.
Calcium Ion Concentration Mechanism
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Pharmaceutical Poisoning: Potential Scenarios01:26

Pharmaceutical Poisoning: Potential Scenarios

Pharmaceutical poisoning can occur through various channels, impacting an estimated 2 million hospitalized patients in the U.S. annually with serious adverse drug responses. These scenarios encompass both therapeutic uses, such as drug toxicity, where even standard dosages can lead to severe central nervous system depression, and non-therapeutic exposures, including accidental ingestion by children, and environmental and occupational exposures.Unintentional poisonings often involve exploratory...
Flashbulb Memory01:16

Flashbulb Memory

A flashbulb memory is a highly vivid and detailed memory, often linked to events of significant emotional impact. These memories stand out in contrast to everyday memories due to their clarity and the precision with which they are recalled. The strong emotions associated with the event act as a catalyst, ensuring that specific details, such as one's location, actions, and even peripheral elements, are etched into memory with remarkable accuracy. For example, many people can vividly recall where...
Kubler Ross's Stages of Dying01:21

Kubler Ross's Stages of Dying

Elisabeth Kübler-Ross significantly advanced psychology's understanding of the process of dying with her influential book, On Death and Dying (1969). She focused on studying terminally ill individuals and outlined five stages commonly experienced when coping with death: denial, anger, bargaining, depression, and acceptance.
In denial, individuals reject the reality of their condition, often thinking, "This isn't true; I feel fine," as a way to protect themselves from emotional distress. Anger...
Schizophrenia01:17

Schizophrenia

Schizophrenia, a term introduced by Swiss psychiatrist Eugen Bleuler in 1911, describes a severe psychological disorder marked by profound disruptions in attention, thought processes, language, emotion, and interpersonal relationships. The core feature of schizophrenia is psychosis — a state characterized by a fundamental detachment from reality. This disconnection manifests through distorted logic, impaired perception, and atypical behavior, severely affecting the lives of those diagnosed.

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Related Experiment Video

Updated: Jul 22, 2026

Use of a Psychophysiological Script-driven Imagery Experiment to Study Trauma-related Dissociation in Borderline Personality Disorder
09:55

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Published on: March 8, 2018

Suicide by firearms: a 15-year experience.

R E Kohlmeier1, C A McMahan, V J DiMaio

  • 1Bexar County Medical Examiner's Office, TX, USA.

The American Journal of Forensic Medicine and Pathology
|January 5, 2002
PubMed
Summary

Firearm suicide cases show handguns are most common. Entrance wounds to the back of the head do not always indicate homicide, challenging common beliefs in forensic pathology.

Area of Science:

  • Forensic Pathology
  • Public Health
  • Firearm Injury Research

Background:

  • Firearm suicide is a significant public health issue.
  • Understanding patterns of firearm use in suicides is crucial for prevention.
  • Previous assumptions about wound location and intent require examination.

Purpose of the Study:

  • To analyze firearm characteristics and wound patterns in suicide cases.
  • To investigate the demographics of firearm suicide victims.
  • To clarify the interpretation of gunshot wound locations, particularly to the head.

Main Methods:

  • Retrospective review of 1704 firearm suicide cases.
  • Data collected from the Bexar County Medical Examiner's office (1984-1998).
  • Analysis of victim age, weapon type, wound site, and range of fire.

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Main Results:

  • Handguns were used in approximately 78% of firearm suicides.
  • Victim age distribution was similar between males and females.
  • Entrance wounds to the back of the head occurred in 4.0% of head wound cases, refuting a universal homicide indicator.
  • Intermediate range wounds were observed in 1.9% of cases.
  • Specific weapon types showed distinct preferred wound sites (e.g., handguns to the temple, rifles/shotguns to the mouth).

Conclusions:

  • Handgun prevalence in firearm suicides is high across genders.
  • The location of a gunshot wound to the head does not solely determine its classification as homicide.
  • Detailed analysis of firearm suicide data provides valuable insights for forensic investigations and public health strategies.