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Related Concept Videos

Muscles that Move the Head01:19

Muscles that Move the Head

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The muscles that move the head are a dynamic and complex group of structures that work together to facilitate a wide range of head movements, including rotation, flexion, extension, and lateral bending.
The bilateral sternocleidomastoid, or SCM, and the suprahyoid and infrahyoid muscles are significant head flexors. The SCM muscles originate at the sternum and clavicle and attach to the mastoid process of the temporal bone. The SCM contracts bilaterally to bend the head forward, whereas...
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The human body's intricate network of arteries ensures that every organ system receives the necessary oxygen and nutrients for optimal function. The arterial network in the head and neck region is particularly complex, providing vital blood flow to the brain, eyes, and other critical structures. Prominent arteries in this region include the internal carotid arteries and the vertebral arteries.
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The blood drainage from the head and neck is primarily managed by three pairs of veins: the external jugular, internal jugular, and vertebral veins. The external jugular veins drain superficial scalp and face structures, passing over the sternocleidomastoid muscles to empty into the subclavian veins.
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Nursing Clinical Information System (NCIS)
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Clinical Trials01:16

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Clinical trials are prospective experimental studies conducted on humans to determine the safety and efficacy of treatments, drugs, diet methods, and medical devices. Using statistics in clinical trials enables researchers to derive reasonable and accurate conclusions from the collected data, allowing them to make wise decisions in uncertain situations. In medical research, statistical methods are crucial for preventing errors and bias.
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Clinical development focuses on how the drug will interact with the human body and encompasses four key phases of clinical trials, each serving a specific purpose in assessing the safety and effectiveness of new drugs. These phases overlap and build upon one another. Phase I involves a small group of healthy volunteers (typically 20-80 individuals) or, in cases where significant toxicity is expected, patients with the targeted disease, such as cancer or AIDS. The volunteers are tested for...
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Related Experiment Video

Updated: Feb 14, 2026

A Versatile Model of Hard Tick Infestation on Laboratory Rabbits
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Head lice infestations: A clinical update.

Carl Cummings1, Jane C Finlay1, Noni E MacDonald1

  • 1Canadian Paediatric Society, Community Paediatrics Committee, Ottawa, Ontario.

Paediatrics & Child Health
|February 27, 2018
PubMed
Summary
This summary is machine-generated.

Head lice (Pediculus humanus capitis) are a societal issue, not a disease threat. Diagnosis requires a live louse, with topical treatments like pyrethrins and permethrin being common first-line options.

Keywords:
Dimeticone solutionHead liceInfestationsIsopropyl myristate/cyclomethicone solutionPermethrinPyrethrin

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Area of Science:

  • Medical Entomology
  • Public Health

Background:

  • Head lice (Pediculus humanus capitis) infestations present a significant societal challenge with associated economic costs.
  • Despite not being a primary health hazard or disease vector, diagnosis relies on identifying live lice.

Purpose of the Study:

  • To review current diagnostic criteria for head lice infestations.
  • To evaluate available treatment options for Pediculus humanus capitis.

Main Methods:

  • Literature review of diagnostic methods for head lice.
  • Analysis of treatment efficacy for Pediculus humanus capitis.

Main Results:

  • Diagnosis of head lice infestation necessitates the detection of a living louse.
  • Pyrethrins and permethrin are established first-line treatments in Canada.

Conclusions:

  • Isopropyl myristate/ST-cyclomethicone solution and dimeticone are recommended as second-line therapies.
  • Alternative treatments should be considered following evidence of first-line treatment failure.