Some Numbers to learn by heart:

Disclaimer: This list is not complete, these are not all the numbers you need to know.

Number of neurons in an fMRI voxel: ​100.000
Size of a voxel:​ 1 mm3​
Age at which most children pass Sally Anne Test:​ 4
Number of nerves in cervical - thoracic - lumbar - sacral region: ​8 - 12 - 5 - 5

relation brain mass and number of neurons cerebellum - whole brain: ​10% mass, 50% neurons

amount of cerebral neurons with inhibitory output:​ 20% V1: ​BA17
M1: ​BA4
Broca’s area:​ BA44/45

Output layer:​ 5(&3)
Input layer: ​4(&2)
duration London taxi driver training:​ 3-4 years
amount of streets they should remember:​ 25000 streets​ (6-mile radius from

Charing Cross)
Probability of experiencing a phantom limb when limb is lost at the age of ​6: 10%

Probability of experiencing a phantom limb when limb is lost at the age of ​6-10: 50% Probability of experiencing a phantom limb when limb is lost when older than 1​ 0: 90% firing threshold for eliciting decision:​ 68 Hz ​(not an established natural constant, just finding of the presented experiment)

see also

Tags: neuroscience science
Superlink: 050 🧠Neuroscience

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Created: 15-06-24 18:57