Table 6. Fiber Types in Extraocular Muscle
|
Orbital Layer |
Global Layer |
Fiber: |
1 |
2 |
3 |
4 |
5 |
6 |
2 |
Innervation: |
Single |
Multiple |
Single |
Single |
Single |
Multiple |
Multiple |
Mouse112 |
Orbital singly innervated, 5–10 μm |
Orbital multiply innervated, 3–7 μm |
Small dark, 10–15 μm |
|
Large light, 20–25 μm |
Global, multiply innervated, 5–7 μm |
|
Rat116 |
Dark, 10–25 μm |
Clear, 5–10 μm |
Dark, 10–20 μm |
Intermediate, 20–30 μm |
Pale, 30–40 μm |
Clear, 15–25 μm |
|
Rabbit114 |
Orbital singly innervated, 10–15 μm |
Multiply innervated, 10 μm |
Small dark, 10–15 μm |
Intermediate, 15–25 μm |
Large white, 25–35 μm |
Large fibril, multiply innervated, 15–20 μm |
Pseudo-orbital, multiply innervated, 10–15 μm |
|
|
Multiply innervated, 5–15 μm |
|
|
|
|
|
Cat; superior, rectus140,144 |
Small fibril, granulated, 15 μm |
Large fibril, granulated, 15 μm |
Small fibril, granulated, 15 μm |
Lightly granulated, 25 μm |
Fibrillar, white, 35 μm |
Afibrillar, white |
Large fibril, granulated, 15 μm |
Cat, inferior oblique110 |
Type 3, 12 μm |
Type 5, 12 μm |
Type 3, 12 μm |
Type 2, 22 μm |
Type 1, 31 μm |
Type 4, 23 μm |
Type 5, 12 μm |
Sheep117 |
Small C, 15 μm |
Small G, 13 μm |
Small C, 15 μm |
Intermediate C, 25 μm |
Large A, 29 μm |
Large G, 32 μm |
|
|
|
Intermediate G, 24 μm |
|
|
|
|
|
|