The first type of supratentorial herniation is uncal herniation, also referred to as transtentorial herniation.

第一种类型叫做颞叶钩回疝，也称为小脑幕切迹疝。

The third type of supratentorial herniation is cingulate or subfalcine herniation.

第三种幕上脑疝是扣带回疝，或称大脑镰下疝。

Finally, a cingulate herniation is often a forerunner of other types of supratentorial herniation.

最后，扣带回疝往往是其他类型幕上脑疝的先兆。

The fourth type of supratentorial herniation is transcalvarial herniation, which is also called an external herniation.

第四种类型的幕上脑疝是颅脑外疝，也可称为外疝。

Ok, so, now let's focus on supratentorial pediatric tumors.

好，现在让我们来认识下儿童脑幕上肿瘤。

A rare supratentorial pediatric tumor is a pinealoma, which forms in the region of the pineal gland.

还有一种罕见的儿童脑幕上肿瘤：松果体瘤，在松果体中形成。

Alright, so supratentorial herniations include four types of displacement and these differ by the exact part of the cerebrum that is affected.

幕上脑疝分为四种类型，分类的依据是大脑受影响的部位。

There can be a supratentorial herniation where the cerebrum is pushed against the skull or the tentorium.

可能形成幕上脑疝：包括大脑被压迫挤压颅骨或是小脑。

Brain tumors can be categorized by their primary site location as either supratentorial, or infratentorial tumors – though some tumors can form in either.

脑肿瘤可以根据它们的原发部位分类为脑幕上或脑幕下肿瘤，某些肿瘤可以同时位于脑幕上和脑幕下。

The second type of supratentorial herniation is central herniation, and that's when the diencephalon and parts of the temporal lobes slip under the free edge of the tentorium.

第二种幕上脑疝叫做中央疝，即间脑和部分颞叶被推入小脑幕游离下缘。

First off, there's the cerebral cortex which is the part of the brain that's supratentorial or above the tentorium, and the cerebellum, which is infratentorial or below the tentorium.

首先是大脑皮层，在脑幕上方，然后是小脑，在脑幕下方。

These cells are found in glands, like the supratentorial pineal gland which is located just behind the third ventricle, or the infratentorial pituitary gland located near the front of the third ventricle.

这些细胞位于腺体中，例如在第三脑室后的脑幕上松果体，或是靠近第三脑室前的脑幕下垂体腺。