## basilar_tonotopic_full.jpg

The image is a detailed diagram illustrating the tonotopic arrangement along the basilar membrane of the cochlea in the inner ear. This arrangement is crucial for frequency analysis and hearing perception.

### Description:

1. **Overall Structure**:
   - The diagram shows a cross-section of the cochlea, which is a spiral-shaped structure within the inner ear.
   - The cochlea is divided into three main parts: the basal turn (closest to the base), middle turn, and apical turn (closest to the apex).

2. **Dimensions**:
   - The width at the apex (the narrowest part) of the basilar membrane is 0.50 mm.
   - The average widths are as follows:
     - Basal turn: 0.21 mm
     - Middle turn: 0.34 mm
     - Apical turn: 0.36 mm
   - The total length of the basilar membrane is 32 mm.

3. **Frequency Representation**:
   - Frequencies are represented along a spiral path from the base to the apex.
   - At the base, frequencies range from approximately 1500 Hz to 7000 Hz (higher frequencies).
   - As you move towards the apex, the frequency decreases, with lower frequencies (around 2000 Hz) at the apex.

4. **Textual Information**:
   - The text provides additional details about the basilar membrane's properties and its relation to frequency perception.
   - It mentions that the tonotopic arrangement is related to the physical properties of the basilar membrane, which narrows and stiffens towards the base (apex).

5. **Source**:
   - The diagram is sourced from "Audiology: Science to Practice" by Kramer & Brown.
   - It references a work by Fritz Stuhlmacher Jr., 1943.

6. **Visual Representation**:
   - The spiral is divided into sections, each representing different frequency ranges.
   - The frequencies are labeled at various points along the spiral path.

### People in the Image:

There are no people depicted in this image; it is a scientific diagram of the cochlea and its tonotopic arrangement.

This description was generated automatically from image files by a local LLM, and thus, may not be fully accurate. Please feel free to ask questions if you have further questions about the nature of the image or its meaning within the presentation.