This is because walnut shells resemble the human skull, and walnut nuts resemble the human brain.
Any break in the cranial bone, also known as the skull, is considered a skull fracture. There are numerous types of skull fractures, but only one major cause: a decisive enough blow to the head to break the bone. The fracture may be accompanied by a brain injury, but this is not always the case.
A fracture isn't always obvious. However, the following symptoms may indicate a fracture:
The severity of the fracture determines the treatment. In mild fractures, pain medication may be the only treatment required, whereas neurosurgery may be necessary for more serious injuries.
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