Vestiges of vibrissal capsular muscles exist in the human upper lip

  title={Vestiges of vibrissal capsular muscles exist in the human upper lip},
  author={Yuichi Tamatsu and Kazue Tsukahara and Mitsuyuki Hotta and Kazuyuki Shimada},
  journal={Clinical Anatomy},
In nonhuman mammals, sinus hairs grow around the nostrils and serve for tactile sensation. The hair follicles of sinus hairs are rooted in vibrissal capsular muscles connected to the underlying, deeper orbicularis oris, thereby enabling the voluntary movement of sinus hairs. These vibrissal capsular muscles as well as the sinus hairs are believed to have been lost during human evolution, and no previous reports can be found on the existence of vestiges of sinus hairs in humans. Our study… Expand
The Morphology of the Rat Vibrissal Follicle-Sinus Complex Revealed by Three-Dimensional Computer-Aided Reconstruction
This study has demonstrated the previously underappreciated 3-dimensional structure of the vibrissal FSC, which differs from previously reported descriptions, and provides data that will enhance the understanding of vibrISSal function. Expand
The morphology and origin of the skeletal muscle bundles associated with the human mustache
The purpose of the present study was to identify the morphology of the muscle associated with the human mustache using three-dimensional reconstruction of the skin of the superior part of the upper lip region from human cadavers. Expand
Active vibrissal sensing in rodents and marsupials
It is proposed that the presence of active vibrissal touch in both rodents and marsupials suggests that this behavioural capacity emerged at an early stage in the evolution of therian mammals. Expand
Relationship between the depth of facial wrinkles and the density of the retinacula cutis.
Facial wrinkles seem to develop above sites of reduced lower retinacula cutis density, and as a wrinkle develops, the density decreases in both the wrinkle-specific and thewrinkle-inclusive areas, whereas the density difference between those areas vanishes. Expand
Morphological study of the relationship between solar elastosis and the development of wrinkles on the forehead and lateral canthus.
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Striated muscles of the mystacial region of the common albino mouse have been described and it is proposed that these bands become stretched during the protraction of vibrissae and contract, by their elasticity, immediately upon the end of the follicular muscles' contraction, executing the fast return of vibrations to their resting, retracted position. Expand
The sensorineural apparatus of the human eyelid.
The present study confirms the unique sensory neural status of the human eyelid and verifies the presence of Ruffini nerve terminals by light and electron microscopy and of free nerve ending terminals at least by light microscopy, as well as a unique pattern of innervation of thehuman eyelash. Expand
Innervation of hairs in the facial skin of marsupial mammals.
Because of the profusion and variety of innervation in guard hairs of the marsupial mammals, these hairs may have a similar function to vibrissae hairs in placental mammals. Expand
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  • Biology, Medicine
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The sense of touch develops early in phylogeny and is one of the most important senses for the survival of the animal and all mammals except humans are equipped with these highly differentiated touch organs. Expand
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The structural features of sinus hair follicles in Sorex unguiculatus were studied by macroscopic dissection, serial section light microscopy and electron microscopy to find the follicle is more specialized as a vibrating system than in other mammals. Expand
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  • Progress in brain research
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Slowly adapting sinus hair follicle units showed a directional sensitivity and responded to mechanical stimulation with a high-frequency velocity-dependent dynamic impulse discharge and an amplitude-dependent static response. Expand
Über die Feinstruktur der Rezeptoren an Sinushaaren
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SummaryIn an electron microscopic study on glutaraldehyd perfused sinus hair follicles of rats, rabbits and cats, the morphology of the following four different receptors is described:1.The MerkelExpand
The superficial musculo-aponeurotic system (SMAS) in the parotid and cheek areas may be helpful in corrective surgery for facial palsy and during face lifting operations if a retrofascial approach is used. Expand
The specialized junctions between Merkel cell and neurite: an electron microscopic study.
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