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May 9, 2023 · Your brainstem connects your brain to your cervical spinal cord (neck) and consists of three main parts: Midbrain. Pons. Medulla oblongata. (Sometimes, the diencephalon is also considered part of the brainstem.) Together, these three parts work to regulate various involuntary functions, such as breathing, heart rate, and blood pressure.
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Nov 3, 2023 · The midbrain, or mesencephalon, is the most rostral part of the brainstem that connects the pons and cerebellum with the forebrain. For most of its part, the midbrain sits in the posterior cranial fossa, traversing the hiatus of the tentorium cerebelli. The midbrain is the shortest part of the brainstem. However, it contains many important ...
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May 26, 2023 · The midbrain is the smallest of the three regions of the brainstem, measuring around 2cm in length. As it ascends, the midbrain travels through the opening in the tentorium cerebelli. It can be divided into two main parts: Tectum – located posterior to the cerebral aqueduct. Paired cerebral peduncles – located anteriorly and laterally.
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May 9, 2023 · The midbrain, also known as the mesencephalon, is located in the center of the brain, above the pons and below the thalamus. It is an essential part of the brainstem and connects the spinal cord to the forebrain.
- Colliculi
- Tegmentum
- Cerebral Peduncles
At the top of the midbrain are the colliculi, which derives its name from the Latin word for ‘hill. It contains two pairs of bulging, layered bundles of neurons called the superior and inferior colliculi. The superior ones work on preliminary processing of visual signals before they are passed on to the occipital lobe at the back of the head. The i...
The tegmentum (Latin for ‘hood’) actually stretches down the length of the brainstem, but a portion of it forms a part of the midbrain. It contains two areas named after specific colours: the iron-rich red nucleus (which actually looks pink) is involved in the coordination of movements; the periaqueductal grey is a dense region of grey matterand is...
The back of the midbrain contains a pair of large nerve fibre bundles that connect the rest of the brainstem to the forebrain. These cerebral peduncles are the main highway for signals that need to be transported from the cortex to other parts of the central nervous system(CNS), and are especially important for body coordination. Sandwiched between...
Aug 16, 2023 · Corpuls callosum. Parts of the corpus callosum – the genu and the posterior body – can be appreciated in the midline of the section. The genu is located anteriorly and medial to the frontal lobes, while the body is seen posteriorly and medial to the parietal lobes.
Sep 10, 2024 · The midbrain contains the centrally located cerebral aqueduct. Through the aqueduct, the cerebrospinal fluid (CSF) passes from the third ventricle into the fourth ventricle. In practical terms, the midbrain is distinguishable into the tegmentum, the ventral part, and the tectum, the dorsal part.
