Search

Cross section of mouse cochlear duct, basal turn, showing internal structure of organ of Corti to complement surface views seen in the previous images.

Whole-mount, osmium-stained preparations of organ of Corti as seen by light (A) and scanning electron (B) microscopy. The level of focus in “A” is such that the cell bodies (rather than apical surfaces) of the outer hair cells (OHC) are seen. These preparations are from laboratory animals.

A: Apical cochlear turn showing myelinated nerve fibers within the osseous spiral lamina (OSL). B: Basal turn. The organ of Corti (OC) is seen as a lightly-stained band lying adjacent to the osseous lamina. Micrograph shown in “B” from Wright CG, Roland PS. Temporal bone microdissection for anatomic study of cochlear implant electrodes. Cochlear Implants International 2005;6(4):159-168. Copyright John Wiley & Sons Limited. Reproduced with permission.

A: Otic capsule bone drilled to a thin shell to reveal contours of the cochlea. The membranous labyrinth has been stained with osmium so that it appears dark through the thinned bone. An implant electrode array had been inserted into this specimen and a portion of the array can be seen at lower left. B: Similar preparation in which the bone overlying scala vestibuli has been removed to show the osmium-stained basilar membrane and osseous spiral lamina.

Funding Sources for Neonatal-Perinatal Fellows Revised 10/31/2018 Page 1 of 3 1. Funding at UT Southwestern Salary Funding Physician Scientist Training Program: PSTP Current medical residents who are applying for or who have been accepted for fellowship training in one of UT Southwestern’s training programs

Scanning electron micrograph of the spiral ligament beneath the attachment of the basilar membrane to the lateral cochlear wall (the attachment zone of the basilar membrane is indicated by the dotted line at upper left). As in Figure 26, note the porous, mesh-like texture of the spiral ligament. In the region shown here three blood vessels (arrows) are seen coursing very near the surface of the spiral ligament.

Scanning electron microscopic view of the surface of the spiral ligament in the area immediately below the attachment of the basilar membrane. (The site of attachment of the basilar membrane to the lateral wall tissues in indicated by the dotted line.) Note the highly porous, mesh-like structure of the spiral ligament surface. From Roland PS, Wright C.G. Surgical aspects of cochlear implantation: Mechanisms of insertional trauma. Adv Otorhinolaryngol 2006;64:11-30. Copyright S. Karger

Cochlear cross section showing the lower portion of the spiral ligament (SL) facing scala tympani (ST). The curved arrow indicates a venule coursing through the spiral ligament toward the floor of scala tympani. The straight arrow indicates the portion of the spiral ligament seen in the next image. From Roland PS, Wright C.G. Surgical aspects of cochlear implantation: Mechanisms of insertional trauma. Adv Otorhinolaryngol 2006;64:11-30. Copyright S. Karger AG, Basel. Reproduced with

Cochlear cross section showing a vein (arrow) traversing the floor of scala tympani and approaching the posterior spiral vein. The vein has no bony covering.

A: The black arrow indicates a vein on the floor of scala tympani as seen by SEM. A small vessel crossing the perilymphatic space is indicated by the white arrow. B: Higher power view of the area indicated by the black arrow in “A”. Here there is a crack in the tissue revealing RBC’s inside the vein (arrow).