Morphological and Histochemical Differentiation of Intrafusal Fibres in the Posterior Latissimus Dorsi Muscle of the Developing Chick

Overview

Journal Anat Embryol (Berl)

Specialties Anatomy & Histology
Reproductive Medicine

Date 1981 Jan 1

PMID 6455939

Citations 6

Authors

M Toutant

J P Bourgeois

T Rouaud

J P Toutant

Affiliations

Soon will be listed here.

Abstract

Morphological and histochemical differentiation of neuromuscular spindles was studied in the posterior latissimus dorsi (PLD) of the chick during embryonic and post-hatching development. A rapid increase in the number of spindles takes place between the 13th and 15th of embryonic life. By the 15th day in ovo, the spindle capsule appears filled with numerous contiguous cells. Large sensory endings and small primitive motor endings are observed on intrafusal fibres. Ultrastructural observations of the nerve supply of the spindles confirm that each developing spindle receives one thick Ia axon with one to three thin gamma axons. The intracapsular space differentiates by the 17th day of embryonic development. All intrafusal fibres are morphologically of the nuclear-chain type, while two fibre types are distinguished as early as the 14th day of embryonic life, when myofibrillar ATPase activity is demonstrated after acid preincubation. These two histochemical types of intrafusal fibres are also described in the adult. The relation between these two histochemical types and different functional activity of intrafusal fibres is suggested.

Citing Articles

Structure, distribution and innervation of muscle spindles in avian fast and slow skeletal muscle.

Ovalle W, DOW P, Nahirney P J Anat. 1999; 194 ( Pt 3):381-94.

PMID: 10386776 PMC: 1467938. DOI: 10.1046/j.1469-7580.1999.19430381.x.

Transient expression of a ventricular myosin heavy chain isoform in developing chicken intrafusal muscle fibers.

Maier A Histochemistry. 1993; 99(4):333-8.

PMID: 8500996 DOI: 10.1007/BF00269106.

Development of chicken intrafusal muscle fibers.

Maier A Cell Tissue Res. 1993; 274(2):383-91.

PMID: 8269484 DOI: 10.1007/BF00318757.

Quantitative and histochemical aspects of the differentiation of muscle spindles in the anterior latissimus dorsi of the developing chick.

Toutant M Anat Embryol (Berl). 1982; 163(4):475-85.

PMID: 6212000 DOI: 10.1007/BF00305560.

The avian muscle spindle.

Maier A Anat Embryol (Berl). 1992; 186(1):1-25.

PMID: 1387513 DOI: 10.1007/BF00710398.

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