Nervous System

The sciatic nerve is the largest single nerve in the human body, running from each side of the lower spine to deep in the rear and back of the thigh and all the way down to the foot. It connects the spinal cord with the leg and foot muscles.

Communication in the nervous system depends on the transmission of electrical impulses, known as action potentials, that travel along the length of neurons. These electrical signals allow for the rapid and precise transmission of information from one neuron to another, enabling various functions such as sensory perception, motor responses, and cognition.

Generally, mammal nervous systems are more complex and larger than reptile nervous systems due to the higher brain-to-body ratio in mammals. This complexity often translates to higher cognitive abilities and behaviors in mammals compared to reptiles.

Ion channels are specialized proteins that exist in the neural cell membrane. They play a crucial role in allowing ions to pass through the cell membrane, which is essential for generating electrical signals in neurons.

Vagus nerve carries parasynpathetic nerve fibers .

No, the sensory afferent division conveys impulses towards the central nervous system. Afferent neurons transmit sensory signals from sensory receptors to the central nervous system, whereas efferent neurons carry signals away from the central nervous system to muscles and glands.

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There are three main types of neurons based on their function: sensory neurons transmit sensory information (e.g., touch, taste) to the brain, motor neurons control muscle movement, and interneurons relay signals between neurons in the brain and spinal cord. These neurons work together to facilitate communication within the nervous system.

Rats have twelve pairs of cranial nerves.

The hippocampus and prefrontal cortex are two key brain regions involved in learning and memory. The hippocampus is essential for forming new memories, while the prefrontal cortex is involved in higher-level cognitive functions such as decision-making and problem-solving. Both regions work together to support the learning process.

Deep breathing exercises, progressive muscle relaxation, and mindfulness meditation are effective techniques for decreasing sympathetic nervous system firing. These practices help activate the parasympathetic nervous system, promoting relaxation and reducing stress response.

The central nervous system plays a crucial role in daily life by coordinating and regulating bodily functions such as movement, sensation, and thinking. It enables us to perform activities like walking, talking, and processing information. Any disruptions or disorders in the central nervous system can impact daily activities, leading to problems with movement, cognition, and emotions.

There are toxic chemicals that are released from the markers that can kill your brain cells and get you addicted to the smell and the feeling that they give off. Sharpies have the same effect. One teenage boy tried to get high off of a sharpie marker and was killed because of extreme damage to his brain.

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Flexing your biceps primarily involves the somatic motor portion of the nervous system, which controls voluntary muscle movements. The somatic sensory system is responsible for detecting sensations like touch or pain in the skin, muscles, and joints. So, while you may be aware of the sensation in your biceps when you flex them, the actual movement is driven by the somatic motor system.

The autonomic nervous system that controls the functions within the body. Some functions that it controls are the heartbeat, digestive system, and breathing. The autonomic nervous system is the part of the peripheral nervous system that acts as a control system. It functions largely below the level of consciousness to control visceral functions.

i think they belong to the peripheral nervous system (pns)

Vitamin A is required for the synthesis of rhodopsin, a light-sensitive pigment found in the rods of the retina. Rhodopsin is crucial for low-light vision and helps our eyes adjust to changes in light levels. A deficiency in vitamin A can lead to vision problems, particularly night blindness.

Basically the peripheral nervous system (PNS) consists of all nerves and ganglia which are not in the central nervous system (CNS) which consists of the brain and the spinal cord. The PNS can be divided in to the autonomic nervous system (ANS) which controls involuntary functions such as heart rate and the production of saliva and the somatic nervous system.

ANS can be further divided in to two categories called the sympathetic nervous system (SNS) and the parasympathetic nervous system (PNS). SNS and PNS are integral in the homeostatic regulation of the bodies functions.

The somatic nervous system is associated with the bodies voluntary movements such as those of the skeletal muscles, ie the act of you picking up a pen. It is also associated with receiving external stimuli ie hearing, sight and touch.

Calcium (Ca2+) channels open on the synaptic end bulb in response to depolarization (from the action potential), inducing exocytosis of synaptosomes containing neurotransmitter, resulting in neurotransmitter being released into the synaptic cleft...further propagating the signal to the next neuron or set of neurons.

Both Macrophages and leukocytes act as phagocytes within the CNS

It very much depends on what you mean by 'read'. Brain waves are captured routinely every day, in various medical and research settings around the world. But if by read you mean can a computer translate or interpret your thoughts so they can be accurately revealed to others, the answer is no, not yet. Emotional states can be generally determined by brain activity, but specific thoughts, mental images or actual unspoken language cannot be 'read' by any computers known. But that may be changing. The brain is sometimes considered out 'last frontier', the last monumental thing about which we know practically nothing. But we are learning more and more every day.

Vestibular schwannoma, also known as acoustic neuroma, is a non-cancerous tumor that develops on the nerve responsible for balance and hearing, called the vestibulocochlear nerve. Symptoms can include hearing loss, tinnitus, imbalance, and in severe cases, facial weakness or numbness. Treatment options may include observation, radiation therapy, or surgical removal of the tumor.