Question
Which of the following sulcus will be injured due to trauma to the pointed area?
| A. |
Central sulcus
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| B. |
Stem of lateral sulcus
|
| C. |
Inferior frontal sulcus
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| D. |
Intraparietal sulcus
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Show Answer
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Correct Answer � B
Explanation
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|
Stem of lateral sulcus
The marked part in the above image is the Pterion. The pterion is a H-shaped sutural junction on the side of the skull where the parietal, temporal, frontal, and sphenoid bones meet. It is a vulnerable area due to the thinness of the bones at this site.
The lateral sulcus of the cerebrum, also known as the Sylvian sulcus, the stem of the lateral sulcus is the part that extends into the depth of the lateral sulcus. This sulcus serves to separate the temporal lobe below from the parietal lobe above.
MCA, branch of ICA runs in the lateral sulcus, supplying the lateral cerebrum
Reason to rule out other Options:
Central sulcus: This is located more superiorly, separating the frontal and parietal lobes. Trauma to the temporal bone area would not affect the central sulcus.
Inferior frontal sulcus: Located in the frontal lobe, it is anterior to the area shown in the image. Damage to the temporal region would not typically affect this sulcus.
Intraparietal sulcus: This is located in the parietal lobe, posterior and superior to the area marked. Trauma to the temporal bone would not affect the intraparietal sulcus.
