Loop Ii (Lemniscus)

Loop Ii (Lemniscus) is a ribbon-like bundle of nerve fibers through which nerve impulses from the spinal cord and brain stem are sent through the midbrain to the cerebral cortex. The medial loop (medial lemniscus) is formed by fibers heading from the medulla oblongata to the nuclei of the thalamus together with the fibers of general sensitivity, forming the spinal loop adjacent to it; the external lateral loop (lateral lemniscus) is located deep in the triangle of the loop and is connected mainly with the hearing organs.

Medial and external loops

The medial lemniscus is a bundle of nerve fibers in the brain that connects the spinal cord and brain stem to the cerebral cortex. It is part of the brain's information processing system and plays an important role in sensory processing and motor coordination. The medial lemniscus has two main components: medial lemniscus II and medial lemniscus I.

The medial lemniscus II is part of the medial lemniscus that runs from the spinal cord to the cerebral cortex through the midbrain. It consists of many nerve fibers that transmit information from the sensory organs to the cerebral cortex. The medial lemniscus II is the primary connection between the brain and body and plays an important role in controlling movement and motor coordination.

The external lateral lemniscus is another component of the medial lemniscus. It connects the spinal cord to the thalamus and plays a role in processing visual information. The external lateral lemniscus consists of several bundles of nerve fibers, each of which is connected to a specific area of ​​the cerebral cortex responsible for processing visual information.

In general, the medial lemniscus and external lateral lemniscus are important components of the sensory processing system in the brain. They play a key role in motor coordination, visual processing and other brain functions.

Loop II (lemniscus).

Excitations arise in the primary cortical auditory area, then spread to the structure of the hippocampal fields of the temporal lobe, and then pass through the parietal lobe a second time. In the secondary somatosensory fields, the gyri of the parietal lobe interact with the frontal fields of the brain, managing object binding and spatial representations. In all cases, primary excitations first pass through the cortex of the brain stem (thalamus and brainstem), from where, in the form of automaticity, through the medial lemniscus they enter area V7 of the parietal lobe of the cerebral cortex, where their conscious processing is completed.

The medial lemniscus is a complex network of nerve connections that connects various parts of the brain and spinal cord. It plays an important role in processing sensory information and transmitting it from the peripheral nerves to the central nervous system. Sensory information enters the medial lemniscus from all the senses such as vision, hearing, smell, touch, and taste.