This the region of the brainstem comprises neural pathways and tracts that transfer signals from the brain down to the cerebellum and medulla and tracts that transmit the sensory signals up into the thalamus. Pons: The pons is the part of a brainstem and lies inferior to the midbrain, superior to the medulla oblongata and anterior to the cerebellum. These transmit axons of upper motor neurons. The ventral tegmentum is included in paired cerebral peduncles. Numerous nuclei, tracts, and the reticular formation are carried here. The tegmentum of the brain stem which makes the floor of the midbrain and this part is ventral to the cerebral aqueduct. The superior colliculus is committed in the special sense of vision and transmits its superior brachium to the lateral geniculate body of the diencephalon. Superior to the inferior colliculus, the superior colliculus signifies the rostral midbrain. The inferior colliculus is the main midbrain nucleus concerning the auditory pathway and gets input from several peripheral brainstem nuclei, as thoroughly as inputs from the auditory cortex. The tectum comprises the inferior and superior colliculi and dorsal covering of the cerebral aqueduct. The midbrain is the tiniest of the three areas of the brainstem, averaging around 2cm in length.
It is positioned within the brainstem and between the forebrain, and the hindbrain. The midbrain serves important functions in motor movement, particularly movements of the eye, and in auditory and visual processing. Midbrain: Midbrain also called mesencephalon, that is composed of the tectum, tegmentum, and the ventral tegmentum. The brainstem provides multiple fundamental functions including heart rate, breathing, sleeping, and eating. The brainstem additionally regulates the central nervous system and is crucial in maintaining consciousness and controlling the sleep cycle. The brainstem further performs an important role in the regulation of cardiac and respiratory function. This comprises the corticospinal tract (motor), the dorsal column-medial lemniscus pathway ( vibration sensation, fine touch, and proprioception), including the spinothalamic tract ( temperature, pain, itch, and crude touch).
This is an extremely valuable part of the brain as the nerve connections of the motor and sensory systems from the central part of the brain to the rest of the body reach through the brainstem.
Regarding the twelve pairs of cranial nerves, the ten pairs come from the brainstem. The brain stem performs the motor and sensory innervation to the face and neck through the cranial nerves. In the brain, brainstem comprises the midbrain, the pons, and the medulla oblongata. Brain Stem: The brainstem also has known as brain stem is the back part of the brain, joining and structurally continuous with the spinal cord.
0 kommentar(er)
