If a woodpecker can peck more than 20 times per second, what protects their brains from turning into mush?.?

Answer 1

There are a few things.

1. There is spongy bone surrounding the brain
2. Muscles in the neck contract to reduce the jolt

but, the most important ones

3. the beak hits almost perfectly square and perpendicular each time. This reduces sideways and twisting motion that the brain is more sensitive to.

4. The mass (weight) of the brain is very small compared to the area. So the pressure is lower and is spread over a larger area, minimizing damage.

Answer 2

"How do woodpeckers avoid brain damage?

----------------------------------------------------------------------

Recent research using high-speed films of acorn woodpeckers
(Melanerpes formicivorus) shows that their heads can endure up to
1200 gravities of force when the beak hits the wood. Despite this
force, their brains do not suffer damage.

The woodpecker's brain is tightly packed into a capsule of dense but
spongy bone tissue, which absorbs some of the force of sudden shocks
to the outside of the brain case. There is very little fluid
surrounding the brain, so it is not free to jerk around. In
addition, there are special muscles in the woodpecker's head that
contract at just the right moment to absorb still more of the shock.
There are also support structures that pass around the back of the
skull, starting near the base of the tongue.

The woodpecker's brain is not the only part of the bird's head that
must be protected. If it didn't close its eyes just before each
peck, they would fly clear out of their sockets."
----------

"Dear Straight Dope:

How do woodpeckers keep from bashing their little brains out when they peck the trees in my yard? Don't they get killer headaches? --Rich Franz

SDSTAFF Colibri replies:

A woodpecker's job isn't as big a headache as it might seem. Several adaptations allow these birds to get their grubs without knocking themselves out.

A woodpecker's bill is stoutly built, composed of strong bones covered by a tough horny beak. Species that habitually excavate hard wood (some glean bark or even forage for ants on the ground) have bills with chisel-shaped tips and longitudinal ridges for added strength. As protection against flying chips the nostrils are reduced to slits and shielded by lateral ridges and feathers.

One factor in minimizing the impact is that, as in all birds, a woodpecker's brain is much smaller (both absolutely and proportionately) than a human's. Because surface area increases with the square of the linear dimension while mass increases with the cube, impact forces are spread over a relatively greater area, which alone makes the woodpecker 50 to 100 times less vulnerable to impact than a human would be. The blow itself is delivered straight on, reducing hazardous rotational and shearing forces. (However, on follow-through the bird will often twist its head to help dislodge a chip of wood.) Because the braincase is situated above the line of the bill, the force of impact is transmitted mainly below the brain. As in most birds, there is a movable hinge between the upper mandible (maxilla) and the frontal bone of the skull. The hinge in woodpeckers, however, is unusual in that it is folded inwards, so that when a blow is struck the joint undergoes tension rather than compression. Because of this, the tension can be counteracted by a special muscle that helps absorb the shock. The folding over of the frontal bone against the maxilla also forms a kind of locking device that prevents the bill from being forced open by the impact.

Woodpeckers have several other adaptations, including powerful neck muscles, strong legs with sharp claws, and stiffened tail feathers that serve to brace the body against tree trunks. But perhaps their most unusual feature is the tongue, one of the most remarkable adaptations found among birds. Many species use the tongue to extract wood-boring insects from their tunnels. The tongue tip is often barbed to harpoon its quarry, and the salivary glands exude a sticky, almost glue-like saliva to help secure the prey. When the tongue is retracted, the basal supports (hyoid apparatus) extend from the back of the mouth around the back of the skull all the way to the crown of the head. In some particularly long-tongued forms, they extend even further and originate inside the upper mandible. Some species with very strong bills don't have this option because the inside of the upper mandible is taken up by structural supports, so the hyoid apparatus extends into the right eye socket and coils around the eyeball. See this site for an image:

http://www.utep.edu/museum/archive/birds/DDwoodpeckers.htm#image

References:

Winkler, H., D.A. Christie, and D. Nurney. 1995. Woodpeckers: An Identification Guide to the Woodpeckers of the World. Houghton-Mifflen New York.

del Hoyo, J., A. Elliot, and J. Sargatal. (eds). 2002. Handbook of the Birds of the World. Volume 7. Jacamars to Woodpeckers. Lynx Edicions, Barcelona.

--SDSTAFF Colibri
Straight Dope Science Advisory Board"

Answer 3

You are right to wonder. Some time ago I read an authoritative article which included this subject. In it the author described the special suspension mechanism that protected the woodpecker's brain. One is reminded woodpeckers cannot get the "shaken baby syndrome".

Answer 4

Their heads are reinforced with a thick layer. It dated back to the time of the dinosaurs, the bonehead dinosaur. This layer prevents shock from going to the head when a woodpecker is hitting the wood.

Answer 5

The brain of a bird does not have enough Mass to
be Injured as the bird pects.

Answer 6

Because that's not where their brains are... don't your remember his name is WOODY woodpecker? :-)

Answer 7

bbbbbbeeee ccccaaaause theeeey areeee
a wooood pecccccker ! lol.......looks like your bolts need a little tighining,your one tree short of a forest !!!!!

Answer 8

a very small brain

Answer 9

a thick skull and teeny weenie brain?

Answer 10

What a wonderful GOD we have.