The blood supply to the nervous system

The blood supply to the nervous system is crucial for the proper functioning of the brain and spinal cord. Here is a complete tutorial on the blood supply to the nervous system: **Arteries** The brain and spinal cord are supplied by two sets of arteries: the vertebral arteries and the carotid arteries. 1. **Vertebral Arteries**: These arteries arise from the subclavian arteries and enter the transverse foramina of the cervical vertebrae. They then pass through the foramen magnum to enter the cranial cavity and join to form the basilar artery. The vertebral arteries supply the brainstem, cerebellum, and the posterior part of the brain. 2. **Carotid Arteries**: These arteries arise from the common carotid arteries and enter the cranial cavity through the carotid canal. They then branch into the internal carotid artery and the external carotid artery. The internal carotid artery supplies the anterior part of the brain, including the cerebral hemispheres. **Veins** The brain and spinal cord

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Non-invasive BCIs (EEG-based)

This is an exciting and rapidly developing field within neurotechnology. 1. Introduction to Non-invasive BCIs: - Definition and basic concepts - Advantages over invasive BCIs - Historical development 2. Principles of Electroencephalography (EEG): - Neural origins of EEG signals - Frequency bands (delta, theta, alpha, beta, gamma) - Spatial and temporal resolution 3. EEG Recording Techniques: - Electrode placement (10-20 system) - Types of electrodes (wet, dry, active) - Amplification and digitization of signals - Artifact reduction techniques 4. Signal Processing in EEG-based BCIs: - Preprocessing (filtering, artifact removal) - Feature extraction methods: * Time-domain features * Frequency-domain features * Time-frequency analysis * Spatial filter...

Tumors of the Nervous System complete tutorial

Tumors of the nervous system can be classified into two broad categories: primary tumors, which originate in the nervous system, and secondary tumors, which originate elsewhere in the body and spread to the nervous system. Primary tumors of the nervous system can be further divided into benign (non-cancerous) and malignant (cancerous) tumors. **Benign Tumors of the Nervous System:** 1. **Meningiomas**: These are the most common type of benign brain tumor. They arise from the meninges, the membranes that surround the brain and spinal cord. 2. **Schwannomas**: These tumors arise from Schwann cells, which produce the myelin sheath that surrounds and insulates nerve fibers. 3. **Neuromas**: These are benign tumors that arise from nerve tissue. 4. **Pituitary Adenomas**: These are benign tumors that arise from the pituitary gland, a small gland at the base of the brain that produces hormones. 5. **Craniopharyngiomas**: These are benign tumors that arise near the pituitary gland. ...

Neuralink History

Neuralink, founded by Elon Musk in 2016, has been at the forefront of developing brain-computer interface (BCI) technology, aiming to create a seamless connection between the human brain and computers. The company's journey has been marked by significant milestones, challenges, and breakthroughs. In 2019, Neuralink introduced its first prototype, a device that could record and stimulate brain activity. This was followed by the development of a robot capable of performing the delicate surgery required for implanting the device. The robot's design was a collaboration between Neuralink and Woke Studios, showcasing the company's commitment to innovation. In January 2024, Neuralink achieved a major milestone when it announced the successful implantation of its brain-computer interface in a human subject. This marked the beginning of a new era in BCI technology, as the device allowed the subject to control a computer mouse using their thoughts. The company has since continue...

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