Related Experiment Video
Updated: Aug 7, 2026
06:49
Visual Evoked Potential Recording in a Rat Model of Experimental Optic Nerve Demyelination
Published on: July 29, 2015
Deficit, recovery and the vis nervosa
1Royal College Physicians, London. williamian@yahoo.com
Clinical Medicine (London, England)
|July 11, 2006
Summary
Understanding neurological recovery has evolved from ancient theories to modern science. Discoveries in nerve conduction and cortical plasticity offer new hope for neurological rehabilitation.
Area of Science:
- Neuroscience
- History of Medicine
Background:
- Ancient Greeks understood brain-muscle connections mediated by nerves.
- Galen's theory of animal spirits dominated early explanations of nervous action.
- Revival of experimentation spurred new theories, replacing animal spirits with the electrical 'vis nervosa'.
Observation:
- The electrical nature of nerve action was confirmed by the mid-19th century.
- Hodgkin and Huxley's ionic hypothesis elucidated nerve conduction mechanisms in the mid-20th century.
- Membrane mechanisms of nerve conduction failure and restoration were later detailed.
Findings:
- The ionic basis of nerve conduction was definitively established.
- Understanding of membrane physiology advanced significantly.
- Adaptive cortical plasticity was shown to contribute to neurological recovery.
Implications:
- Elucidation of nerve conduction mechanisms led to improved diagnostic tools.
- Potential for more rational therapeutic strategies in neurology.
- Cortical plasticity offers new avenues for neurological rehabilitation and recovery.
Related Concept Videos
01:12Visual Agnosia
Visual agnosia is a condition characterized by the inability to recognize visually presented objects despite having normal vision. For instance, a person with visual agnosia can describe the shape and color of an object but cannot identify or name it. This impairment does not affect their visual field, acuity, color vision, brightness discrimination, language, or memory. An example of this condition in a social setting is someone at a dinner party asking for "that silver thing with a round end"...
01:14Cranial Nerves: Types Part I
Cranial nerves are responsible for transmitting motor and sensory information between the brain and various parts of the body. There are twelve pairs of cranial nerves, with the first six being essential in sensory perception, motor control, and autonomic functions related to the head and neck.
Olfactory Nerve (Cranial Nerve I)
The olfactory nerve, or cranial nerve I, is unique as it is purely sensory and dedicated to the sense of smell. This nerve originates in the olfactory epithelium of the...
Olfactory Nerve (Cranial Nerve I)
The olfactory nerve, or cranial nerve I, is unique as it is purely sensory and dedicated to the sense of smell. This nerve originates in the olfactory epithelium of the...
01:24Prosopagnosia
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...
01:22Autonomic Nervous System
The autonomic nervous system (ANS) is a critical component of the peripheral nervous system, primarily responsible for regulating involuntary bodily functions and maintaining homeostasis. It functions in tandem with the central nervous system (CNS) to seamlessly coordinate various physiological processes without the need for conscious control.
The ANS comprises two main divisions: the sympathetic and parasympathetic divisions. These divisions function antagonistically to maintain a dynamic...
The ANS comprises two main divisions: the sympathetic and parasympathetic divisions. These divisions function antagonistically to maintain a dynamic...
01:15Neurogenesis and Regeneration of Nervous Tissue
In the CNS, neurogenesis, the birth of new neurons from stem cells, is limited to the hippocampus in adults. In other regions of the brain and spinal cord, neurogenesis is almost non-existent due to inhibitory influences from neuroglia, especially oligodendrocytes, and the absence of growth-stimulating cues. The myelin produced by oligodendrocytes in the CNS inhibits neuronal regeneration. Furthermore, astrocytes proliferate rapidly after neuronal damage, forming scar tissue that physically...
01:24Vision
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.