Sensory Hairs as Mechanical Filters in Crista Ampullaris: Passive through Structure and Active through Contraction

1983 ◽  
Vol 96 (sup406) ◽  
pp. 59-60
Author(s):  
Åke Flock ◽  
Steven Orman
Keyword(s):  
Sensory Hairs ◽  
Crista Ampullaris

scholarly journals A STUDY OF THE ORIENTATION OF THE SENSORY HAIRS OF THE RECEPTOR CELLS IN THE LATERAL LINE ORGAN OF FISH, WITH SPECIAL REFERENCE TO THE FUNCTION OF THE RECEPTORS

1962 ◽  
Vol 15 (1) ◽  
pp. 19-27 ◽  
Author(s):  
Åke Flock ◽  
Jan Wersäll
Keyword(s):  
Lateral Line ◽  
Teleost Fish ◽  
Receptor Cell ◽  
The Other ◽  
Receptor Cells ◽  
Lateral Line Organ ◽  
Sensory Hairs ◽  
Crista Ampullaris ◽  
Functional Polarization ◽  
Line Organ

The morphology of the hair bundles on top of the receptor cells in the lateral line organ of the teleost fish Lota vulgaris is described. Each receptor cell shows a distinct morphological polarization. Two groups of receptor cells can be distingiushed, one consisting of cells polarized towards the head, the other consisting of cells polarized towards the tail. In the crista ampullaris all cells are polarized in the same direction. An hypothesis is proposed for the function of the receptor cells in the lateral line organ and the labyrinth based on a correlation of morphological and functional polarization.

scholarly journals Actin filaments in sensory hairs of inner ear receptor cells.

1977 ◽  
Vol 75 (2) ◽  
pp. 339-343 ◽  
Author(s):  
A Flock ◽  
H C Cheung
Keyword(s):  
Guinea Pig ◽  
Inner Ear ◽  
Actin Filaments ◽  
Receptor Cell ◽  
Cell Soma ◽  
Receptor Cells ◽  
Sensory Hairs ◽  
Crista Ampullaris ◽  
The Individual ◽  
Triton X

Receptor cells in the ear are excited through the bending of sensory hairs which project in a bundle from their surface. The individual stereocilia of a bundle contain filaments about 5 nm in diameter. The identity of these filaments has been investigated in the crista ampullaris of the frog and guinea pig by a technique of decoration with subfragment-1 of myosin (S-1). After demembranation with Triton X-100 and incubation with S-1, "arrowhead" formation was observed along the filaments of the stereocilia and their rootlets and also along filaments in the cuticular plate inside the receptor cell. The distance between attached S-1 was 35 nm and arrowheads pointed in towards the cell soma. It is concluded that the filaments of stereocilia are composed of actin.

Development of the crista ampullaris in the mouse

1986 ◽  
Vol 100 (7) ◽  
pp. 759-763 ◽  
Author(s):  
M. Takumida ◽  
Y. Harada ◽  
N. Tagashira
Keyword(s):  
Primary Cilium ◽  
Cba Mice ◽  
Sensory Hairs ◽  
Crista Ampullaris

SummaryThe process of development of the crista ampullaris has been investigated in the mouse using SEM.Cristae ampullaris of the CBA/CBA mice, from the 13.5th gestational day to the day 2 weeks by were studied.On the 13.5th gestational day, there were numerous microvilli and a primary cilium on the crista ampullaris. Sensory hairs first appeared on the 14.5th gestational day. The kinocilium and stereocilia were short and the length of the stereocilia was almost constant. The formation of the cupula, which had fine networklike structures, started on the 14.5th gestational day.

Cytoplasmic Organization in the Receptor Cells of the Crista Ampullaris

1972 ◽  
Vol 30 ◽  
pp. 60-61 ◽  
Author(s):  
Robert F. Dunn
Keyword(s):  
Fine Particles ◽  
Apical Cell ◽  
Apical Region ◽  
Receptor Cells ◽  
Cuticular Plate ◽  
Morphological Organization ◽  
Crista Ampullaris ◽  
Cytoplasmic Organization ◽  
High Degree ◽  
General Appearance

Receptor cells of the cristae in the vestibular labyrinth of the bullfrog, Rana catesbiana, show a high degree of morphological organization. Four specialized regions may be distinguished: the apical region, the supranuclear region, the paranuclear region, and the basilar region.The apical region includes a single kinocilium, approximately 40 stereocilia, and many small microvilli all projecting from the apical cell surface into the lumen of the ampulla. A cuticular plate, located at the base of the stereocilia, contains filamentous attachments of the stereocilia, and has the general appearance of a homogeneous aggregation of fine particles (Fig. 1). An accumulation of mitochondria is located within the cytoplasm basal to the cuticular plate.

scholarly journals THE ULTRASTRUCTURE OF THE SENSORY HAIRS AND ASSOCIATED ORGANELLES OF THE COCHLEAR INNER HAIR CELL, WITH REFERENCE TO DIRECTIONAL SENSITIVITY

1966 ◽  
Vol 29 (3) ◽  
pp. 497-505 ◽  
Author(s):  
Arndt J. Duvall ◽  
Åke Flock ◽  
Jan Wersäll
Keyword(s):  
Guinea Pig ◽  
Hair Cell ◽  
Basal Body ◽  
Organ Of Corti ◽  
Sensory Cells ◽  
Directional Sensitivity ◽  
Inner Hair Cell ◽  
Lateral Line Organ ◽  
Sensory Hairs ◽  
Line Organ

From the apical end of the inner hair cell of the organ of Corti in the guinea pig cochlea protrude four to five rows of stereocilia shaped in a pattern not unlike the wings of a bird. In the area devoid of cuticular substance facing toward the tunnel of Corti lies a consistently present centriole. The ultrastructure of this centriole is similar to that of the basal body of the kinocilium located in the periphery of the sensory hair bundles in the vestibular and lateral line organ sensory cells and to that of the centrioles of other cells. The physiological implications of the anatomical orientation of this centriole are discussed in terms of directional sensitivity.

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