Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Prosopagnosia

Prosopagnosia

Prosopagnosia, also known as face blindness, is the inability to recognize faces. In severe cases, individuals with prosopagnosia may not recognize close family members, including parents and spouses, by their faces. For instance, someone with prosopagnosia might walk past their child in a crowd, only realizing their mistake upon noticing their child's distinctive backpack or favorite jacket. Prosopagnosia specifically impairs facial recognition, while the recognition of other objects or...

Psychosurgery

Psychosurgery

Psychosurgery, the surgical alteration or permanent removal of brain tissue to alleviate severe psychological conditions, stands as one of the most radical and controversial treatments in the history of mental health care. Its development and application have evolved significantly, marked by dramatic shifts in scientific understanding and ethical perspectives.
Historical Development of Psychosurgery
In the 1930s, Portuguese neurologist Antonio Egas Moniz introduced a surgical procedure designed...

Glaucoma: Overview

Glaucoma: Overview

Glaucoma is an eye condition characterized by increased intraocular pressure that damages the retina and optic nerve, leading to irreversible blindness if left untreated. The human eye has various components, including the cornea, iris, pupil, lens, and optic nerve. Aqueous humor is secreted by the epithelium of the ciliary body in the posterior chamber and flows through the trabecular meshwork and canal of Schlemm, maintaining normal intraocular pressure. The trabecular meshwork and the canal...

Photoreceptors and Visual Pathways

Photoreceptors and Visual Pathways

At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category, whereas...

Angle Closure Glaucoma: Treatment

Angle Closure Glaucoma: Treatment

Angle-closure glaucoma, or closed-angle glaucoma, is an eye condition where the iris bulges out and blocks the iridocorneal angle, resulting in a buildup of aqueous humor and increased intraocular pressure. Immediate medical attention is necessary due to the sudden onset of symptoms. The treatment for angle-closure glaucoma includes short-term and long-term approaches. Short-term treatment involves using eye drops like pilocarpine to lower intraocular pressure by increasing aqueous humor...

Accessory Structures of the Eye

Accessory Structures of the Eye

Optical perception, or vision, is an extraordinary sense dependent on converting light signals received via the ocular organs. These organs, known as eyes, are securely positioned within the bony cavities of the skull, called orbits. The orbits serve a dual purpose: a protective shield for the ocular globes and a stable attachment point for the soft ocular tissues. The eye's external protective mechanisms include the eyelids, which are edged with lashes that act as a barrier against foreign...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Characteristics and outcomes of 100 consecutive patients with acute stroke and COVID-19.

Journal of the neurological sciences·2021

Same author

Stiripentol efficacy and safety in Dravet syndrome: a 12-year observational study.

Developmental medicine and child neurology·2018

Same author

Paclitaxel injection concentrate for nanodispersion versus nab-paclitaxel in women with metastatic breast cancer: a multicenter, randomized, comparative phase II/III study.

Breast cancer research and treatment·2016

Same author

Study of idiopathic inflammatory myopathies with special reference to borderland between idiopathic inflammatory myopathies and muscular dystrophies.

Neurology India·2008

Same author

Is streamlined evaluation of children for epilepsy surgery possible?

Epilepsia·2008

Search research articles

Related Experiment Video

Updated: Jun 19, 2026

Optic Nerve Sheath Point of Care Ultrasound: Image Acquisition

Optic Nerve Sheath Point of Care Ultrasound: Image Acquisition

Published on: August 18, 2023

Psychogenic unilateral pseudoptosis.

Basheer A Peer Mohamed¹, Shekhar G Patil

¹Department of Neurology, Great Ormond Street Hospital for Children, NHS Trust, London, UK. pmbasheer@doctors.net.uk

Pediatric Neurology

|October 13, 2009

Summary

A 13-year-old girl experienced sudden unilateral ptosis, later diagnosed as psychogenic pseudoptosis. This rare conversion disorder manifestation in children resolved with placebo and psychological support.

Area of Science:

Neurology
Psychiatry

Background:

Psychogenic pseudoptosis is an uncommon condition.
It is often associated with conversion disorder.

Observation:

A 13-year-old girl presented with sudden onset unilateral ptosis.
She had a history of chronic pain symptoms.
Neurological examinations and investigations were normal.

Findings:

Edrophonium test with placebo showed a dramatic and sustained resolution of ptosis.
This confirmed the diagnosis of psychogenic pseudoptosis.
Psychological assessment and support were initiated.

Implications:

Early recognition of psychogenic pseudoptosis is crucial for effective treatment.

More Related Videos

Event-related Potentials During Target-response Tasks to Study Cognitive Processes of Upper Limb Use in Children with Unilateral Cerebral Palsy

Event-related Potentials During Target-response Tasks to Study Cognitive Processes of Upper Limb Use in Children with Unilateral Cerebral Palsy

Published on: January 11, 2016

Related Experiment Videos

Last Updated: Jun 19, 2026

Optic Nerve Sheath Point of Care Ultrasound: Image Acquisition

Optic Nerve Sheath Point of Care Ultrasound: Image Acquisition

Published on: August 18, 2023

Event-related Potentials During Target-response Tasks to Study Cognitive Processes of Upper Limb Use in Children with Unilateral Cerebral Palsy

Event-related Potentials During Target-response Tasks to Study Cognitive Processes of Upper Limb Use in Children with Unilateral Cerebral Palsy

Published on: January 11, 2016

Psychological interventions are key to recovery in pediatric conversion disorder.

This case highlights the importance of considering non-organic causes for ptosis in children.