Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1996-12-4
pubmed:abstractText
The anatomical organization of the motoneuronal columns of the soleus and lateral gastrocnemius muscle and of the related premotor interneurons was studied in rats, using the retrograde transneuronal transport of WGA-HRP. Motoneurons of the gastrocnemius muscle have a well-developed dendritic arborization which spreads into the transverse plane of the spinal cord extending to the intermediate region of the grey matter, while dendrites of the soleus muscle motoneurons spread mainly in the rosto-caudal plane, where they remain inside the border of the motoneuronal column and form small dendritic bundles, suggesting a coupling of neuronal activity as is to be expected in the motoneurons of a tonically active postural muscle such as the soleus. Gastrocnemial premotor interneurons are located close to the motoneuronal column, while the soleus premotor interneurons are scattered all over the ventral horn and intermediate grey. The number of labelled premotor interneurons is greater when the WGA-HRP is injected into the soleus muscle. In both cases, the premotor interneurons could be classified as four different types on the basis of the shape and size of the neuronal somata. The differences in the anatomical organization of the spinal paths to the gastrocnemius and soleus muscles reflect the different tasks performed by these two synergic muscles in normal motor behaviour: fast phasic activity by the gastrocnemius muscle, slow tonic anti-gravity activity by the soleus muscle.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:issn
0021-8359
pubmed:author
pubmed:issnType
Print
pubmed:volume
37
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
81-9
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1996
pubmed:articleTitle
Anatomical organization of the spinal paths to the soleus and gastrocnemius muscles of the rat hind limb.
pubmed:affiliation
Istituto di Anatomia Umana, Università degli Studi di Milano, Italia.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't