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Variations in microanatomy of the human cochlea.

Avci E, Nauwelaers T, Lenarz T, Hamacher V, Kral A - J. Comp. Neurol. (2014)

Bottom Line: At the lateral region, the height decreased significantly at the beginning of the second turn.We found a correlation between the length of the RC and that of the ST.These differences could have considerable implications for approaches to the design of CI arrays, especially in terms of their ability to preserve residual hearing during insertion of the electrode array.

View Article: PubMed Central - PubMed

Affiliation: Cluster of Excellence Hearing4all, Institute of AudioNeuroTechnology and Department of Experimental Otology, Ear, Nose, and Throat Clinics, Hannover Medical University, Hannover, 30625, Germany.

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A–C: Cross-sectional view of two cochleae in coronal (A), sagittal (C), and cochlear views (B). D: Three-dimensional surface reconstruction of the scala tympani with the largest (beige, TB11), and smallest (pink, TB06) cross-sectional diameter observed in 16 temporal bones (see Fig. 8). The large dimensional variability between the largest and smallest scala tympani is clearly visible. CA, cochlear axis; RW, round window. Scale bar = 1 mm.
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fig06: A–C: Cross-sectional view of two cochleae in coronal (A), sagittal (C), and cochlear views (B). D: Three-dimensional surface reconstruction of the scala tympani with the largest (beige, TB11), and smallest (pink, TB06) cross-sectional diameter observed in 16 temporal bones (see Fig. 8). The large dimensional variability between the largest and smallest scala tympani is clearly visible. CA, cochlear axis; RW, round window. Scale bar = 1 mm.

Mentions: All the right cochleae were mirrored to left cochleae. To compare dimensions of multiple cochleae, the centers of the RW were merged, and the z-axes (connecting the center of the modiolus [central axis] and the helicotrema) were placed in parallel, as were the axes running from the center of the RW toward the central axis (see Fig. 6B). To measure cochlear dimensions, the standard cochlear coordinate system was used (Verbist et al., 2010). The starting point for measuring the cochlear length was the inferior edge of the RW. A line connecting the center of the long diameter of the RW and the central axis of the center of the modiolus was the reference line for angle measurements (0° reference angle).


Variations in microanatomy of the human cochlea.

Avci E, Nauwelaers T, Lenarz T, Hamacher V, Kral A - J. Comp. Neurol. (2014)

A–C: Cross-sectional view of two cochleae in coronal (A), sagittal (C), and cochlear views (B). D: Three-dimensional surface reconstruction of the scala tympani with the largest (beige, TB11), and smallest (pink, TB06) cross-sectional diameter observed in 16 temporal bones (see Fig. 8). The large dimensional variability between the largest and smallest scala tympani is clearly visible. CA, cochlear axis; RW, round window. Scale bar = 1 mm.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4265794&req=5

fig06: A–C: Cross-sectional view of two cochleae in coronal (A), sagittal (C), and cochlear views (B). D: Three-dimensional surface reconstruction of the scala tympani with the largest (beige, TB11), and smallest (pink, TB06) cross-sectional diameter observed in 16 temporal bones (see Fig. 8). The large dimensional variability between the largest and smallest scala tympani is clearly visible. CA, cochlear axis; RW, round window. Scale bar = 1 mm.
Mentions: All the right cochleae were mirrored to left cochleae. To compare dimensions of multiple cochleae, the centers of the RW were merged, and the z-axes (connecting the center of the modiolus [central axis] and the helicotrema) were placed in parallel, as were the axes running from the center of the RW toward the central axis (see Fig. 6B). To measure cochlear dimensions, the standard cochlear coordinate system was used (Verbist et al., 2010). The starting point for measuring the cochlear length was the inferior edge of the RW. A line connecting the center of the long diameter of the RW and the central axis of the center of the modiolus was the reference line for angle measurements (0° reference angle).

Bottom Line: At the lateral region, the height decreased significantly at the beginning of the second turn.We found a correlation between the length of the RC and that of the ST.These differences could have considerable implications for approaches to the design of CI arrays, especially in terms of their ability to preserve residual hearing during insertion of the electrode array.

View Article: PubMed Central - PubMed

Affiliation: Cluster of Excellence Hearing4all, Institute of AudioNeuroTechnology and Department of Experimental Otology, Ear, Nose, and Throat Clinics, Hannover Medical University, Hannover, 30625, Germany.

Show MeSH
Related in: MedlinePlus