Keyword Analysis & Research: nigra

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What is function substantia nigra?

The substantia nigra is an important player in brain function, in particular, in eye movement, motor planning, reward-seeking, learning, and addiction. Many of the substantia nigra's effects are mediated through the striatum.

What does substantia nigra mean?

The substantia nigra is one of the brainstem nuclei and part of the extrapyramidal system. While other nuclei such as the red nucleus are as small and contained within an axial slice at the superior colliculi (see figure), the substantia nigra is seen in axial slices at both superior and inferior colliculi.

What is a linea nigra?

A linea negra, also commonly called a linea nigra, is a dark line on the skin that runs from the navel down to the public bone and sometimes also up to the mid-abdomen.

What is a nigra arborvitae?

Arborvitae (Thuja occidentalis) is a variety of Eastern North American cedar tree. Cedar trees are aromatic landscaping trees. “Nigra” arborvitae is commonly called dark American arborvitae (Thuja occidentalis “Nigra”), which grows in U.S. Department of Agriculture plant hardiness zones 3 through 8.


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