Veterinary Histology and Embryology

Effectors

EFFECTORS : MOTOR END PLATE (somatic efferent fibres)

• Nerve fibre outer perimysium and branch to pass to individual muscle fibres where they end in structures called motor end plate.
• At the end plate region the myelin is lost and endoneurium becomes continuous with endomysium of muscle fibre.
• The axon devoid of its sheath divides to fine terminations which are in close contact with the sarcolemma.
• The nerve ending does not penetrate into sarcolemma.
• Beneath the end plate region, there is an increase in the number of muscle nuclei in a region known as the sole of motor plate.