Thalamus. (a) Medial view. The thalamus forms the superior part of the lateral wall of the third ventricle. The hypothalamic sulcus is the border between the thalamus above and hypothalamus below. (b) Superolateral view of the position of the thalamus in the lateral ventricle. The thalamus is located in the center of the lateral ventricle at the upper end of the brainstem. The anterior thalamic nucleus (tubercle) forms the posterior edge of the foramen of Monro. (c) Superior view. The upper margin of the thalamus forms the lateral parts of the floor of the lateral ventricle. The stria terminalis and thalamostriate vein run along the striathalamic sulcus. (d) The fornix wraps around the medial edge of the thalamus, and the caudate nucleus wraps around the lateral edge of the thalamus. (e) Posterolateral view. The left thalamus was removed to expose the subthalamic nucleus and red nucleus. The pulvinar is the posterolateral part of the thalamus.
终纹和丘脑纹状体静脉沿着丘脑和尾状核的交界处的纹状丘脑沟走行。脉络丛附着于丘脑和穹隆之间的脉络裂。
每一侧的侧脑室都包裹着丘脑的上、下和后表面。
丘脑后方的突出部，被称为丘脑枕核( Pulvinar)，它参与构成了3个幕上结构的壁:
丘脑枕核的后外侧构成了侧脑室房部(三角部)的前壁外侧;
丘脑枕核的后内侧被穹隆脚所覆盖，位于穹隆内侧的部分构成了四叠体池的前壁;
在膝状体区域的丘脑枕核的下外侧部构成环池的顶壁。
丘脑的内侧部分形成第三脑室侧壁的上部。