This histological study was designed to define the anatomical background of the neuromuscular control mechanism involved in the non-ruminant omnivorous mastication, focusing on the muscle spindle supply to each muscle belly of the jaw muscles of 3 pig fetuses (near term). The jaw-closing muscle averaged 427 muscle spindles, 566 spindles, 703 spindles on one… (More)
Histological examination of the jaw muscles of the Japanese ermine showed that 4 jaw-closing muscles have 13 muscle spindles on one side of the face. The temporal muscle has 99 muscle spindles, 68 being in the anterior vertical and 31 in the posterior horizontal belly. The masseter muscle has 33 muscle spindles, 23 being in the profound and 10 in the… (More)
The jaw-closing muscles of two bovine fetuses average 1,177 muscle spindles on one side of the face: 549 in the masseter, 433 in the temporalis, 192 in the medial pterygoid, and three in the lateral pterygoid. The jaw-opening muscles have no spindles.