Alpha motor neuron

In the article, “Is Google Making Us Stupid?” by Nicholas Carr says that his current troubles with concentrating while reading books and long articles might be because of investing a considerable measure of energy in the Internet. He believes that the customary internet utilization may have the impact of decreasing the limit with concentration and contemplation. Carr goes ahead and gives an exceptionally very much examined record of how contents on the web should make the browsing experience…

Amyotrophic Lateral Sclerosis (ALS) is a neurodegenerative disease that involves motor neurons in the brain and spinal cord. ALS is considered to be one of the most common progressive neurological diseases, affecting approximately 20,000 individuals in the United States in a given year (Fried-Oken et al., 2006). Etiology of ALS remains unknown; however, there appears to be an existing genetic component associated with this disease. Changes in speech are first seen in patients with bulbar onset…

Upon development, the nervous system wires itself completely – an impressive feat considering the millions of connections and neurons in the body. However perhaps even more impressive is the ability of the nervous system to restore neuronal connections after injury. This is particularly advanced in frogs, fish and invertebrates as once an axon is cut in the central nervous system, the regeneration allows full functional recovery whereas in the mammalian central nervous system full recovery is…

lzheimer's is the progressive mental deterioration that can occur in middle or old age, due to generalized degeneration of the brain. There is a lot of discussion in the eldercare community these days regarding Alzheimer's. With the advancements in medical technology, people are living longer than in past generations. It seems like a lot of folks may be able to physically get around better, but have more challenges with mental health issues such as Alzheimer's. According to WebMD, the biggest…

Have you ever wondered how the brain works or how it is connected? Outside the brain there appears to be a handful of pink and gray muscles. However, as you enter the human brain, it reveals an extremely complex circuit, connecting you with the rest of your body. The brain contains almost 100,000 miles of blood vessels and billions of cells. It is the consummate library of information, remembering data and processing it as quickly as 11 million bits per second (The Human Brain). The brain is a…

areas of difficulty involve motor speech, which affects her intelligibility. Particularly relating to the larynx, use of the tongue in speech and coordination of the lips and palate. This indicates that Susan is likely experiencing mixed spastic-ataxic dysarthria due to lesions on the upper motor neurone pathway (Wilkinson and Lennox 2005) in the corticobulbar tract which innervates the cranial nerves and the cerebellum (Bethoux et al 2013). Lesions on the upper motor neurone pathway/…

Ankylosing spondylitis (AS), or Bechterew’s disease, is an inflammatory disease that can cause the vertebrae in the spine to fuse together. The fusing that takes place will make the spine less flexible and can lead to a curvature of the spine culminating in a stood posture. This disease predominantly affects males in their teens 20s, and is less common in women. Early signs and symptoms of ankylosing spondylitis may include pain and stiffness in the neck, lower back, and hips. These signs and…

Multiple sclerosis (MS) is an idiopathic autoimmune disorder that affects the nervous system. MS results from progressive demyelination of the white matter of the brain and spinal chord. Multiple sclerosis affects the nervous system by damaging the nerve cell’s myelin, a process known as demyelination. Multiple sclerosis causes scattered demyelinated lesions causing neurologic dysfunction. The myelin is a lipoprotein complex formed of glial cells. The primary functions of the axonal myelin are…

Explanation of EMG signals EMG stands for electromyography. Muscle fibres generate tiny electrical currents prior to the production of muscle force. These currents are generated by the exchange of ions across muscle fibres membranes, a part of the signalling process for the muscle fibres to contract. EMG is the signal made, it can be measured by applying conductive elements or electrodes to the skin surface, or invasively with the muscle. When using EMG, tiny devices named electrodes are used…

Such as, the brain giving the lost limbs somatosensory/motor cortex another job. Due to this event the brain will get confused when new signals arrive and might translate as the phantom limb being in pain. While for the spinal cord its believe that once the surgery occurs an abundance of receptors are created…