ScholarLens Back to search
1934•Archives of Neurology And PsychiatryRequires access

EXPERIMENTAL LESIONS OF THE PYRAMIDAL TRACT

Clyde Marshall

Open publisher page 27 citations

Abstract

The experiments reported here represent an attempt to produce lesions in the corticospinal or pyramidal tracts without damage to other motor systems. This cannot be attained by operative lesions on the motor cortex, for there descend from here many other efferent fibers besides the pyramidal, as Mellus1long ago demonstrated. Lesions in the cord are equally unsatisfactory, for the pyramidal tract in this location can hardly be completely interrupted without damage to the rubrospinal system, although Ranson, Muir and Zeiss2reported the case of one cat in which they thought that this might have been attained. The most satisfactory site is in the medulla, where the pyramids lie exposed on the ventral surface for a short distance above the decussation. Since not all of the fibers cross the midline, it is necessary to cut both tracts in order to remove completely pyramidal innervation from even one side of

About this research paper

What this paper is about

The experiments reported here represent an attempt to produce lesions in the corticospinal or pyramidal tracts without damage to other motor systems. This cannot be attained by operative lesions on the motor cortex, for there descend from here many other efferent fibers besides the pyramidal, as Mellus1long ago demonstrated. Lesions in the cord are equally unsatisfactory, for the pyramidal tract in this location can hardly be completely interrupted without damage to the rubrospinal system, although Ranson, Muir and Zeiss2reported the case of one cat in which they thought that this might have been attained. The most satisfactory site is in the medulla, where the pyramids lie exposed on the ventral surface for a short distance above the decussation. Since not all of the fibers cross the midline, it is necessary to cut both tracts in order to remove completely pyramidal innervation from even one side of

Why it matters

OpenAlex reports 27 citations for this work. Citation counts describe recorded attention and do not establish research quality.

Key contribution

A contribution statement is not available in the OpenAlex record.

Method / approach

Method details are not available in the OpenAlex metadata.

Main findings

Findings are not separately available in the OpenAlex metadata.

Limitations

Limitations are not available in the OpenAlex metadata.

Applications

Application details are not available in the OpenAlex metadata.

Available abstract

The experiments reported here represent an attempt to produce lesions in the corticospinal or pyramidal tracts without damage to other motor systems. This cannot be attained by operative lesions on the motor cortex, for there descend from here many other efferent fibers besides the pyramidal, as Mellus1long ago demonstrated. Lesions in the cord are equally unsatisfactory, for the pyramidal tract in this location can hardly be completely interrupted without damage to the rubrospinal system, although Ranson, Muir and Zeiss2reported the case of one cat in which they thought that this might have been attained. The most satisfactory site is in the medulla, where the pyramids lie exposed on the ventral surface for a short distance above the decussation. Since not all of the fibers cross the midline, it is necessary to cut both tracts in order to remove completely pyramidal innervation from even one side of

Key concepts: Pyramidal tracts, Decussation, Pyramidal cell, Anatomy, Medulla, Corticospinal tract, Efferent, Cortex (anatomy)

Related papers

Related paper 1Related paper 2
Back to paper searchBrowse research topicsOriginal source
EXPERIMENTAL LESIONS OF THE PYRAMIDAL TRACT — Research Paper | ScholarLens