When you feel under pressure, your body activates its stress response. Heart rate rises, breathing becomes faster and shallower, and muscles prepare for action. This is helpful in short bursts, such as when you need to react quickly to danger. The problem begins when the pressure never switches off. Work deadlines, financial worries, family responsibilities,…
Myotomes are groups of muscles supplied by the motor fibers of a single spinal nerve root. A single neuron’s sensory fibers innervate a dermatome, which is a section of skin. Myocommata (plural: myocommata) is what separates myotomes. The part of a somite that turns into muscle during vertebrate development is called the myotome. Introduction Myotomes are spinal nerve roots that innervate a set of muscles (Greek: myo = muscle, tome = component, volume). When nerve radiculopathy is suspected, myotome testing is an important part of the neurological assessment. Since all skeletal muscles are innervated by nerves from several spinal cord levels, myotomes are even more difficult to evaluate than dermatomes. The somatic nervous system is composed of myotomes and is a component…
Introduction The endomorph body type is characterized by a naturally higher percentage of body fat and a rounder physique. People with this body type often have a larger bone structure, broader hips, and a tendency to gain weight more easily, especially in the lower body. This body type is also associated with a slower metabolism,…
Nerve tissue is a fundamental component of the nervous system, responsible for transmitting signals throughout the body. Comprising of specialized cells called neurons, nerve tissue is characterized by its unique structure and function. What is a Nerve Tissue Composition? Within the neurological system, neurons are cells that send messages to other neurons, muscles, or gland…
What is a Central Nervous System? The central nervous system and the peripheral nervous system are two subtypes of the nervous system. The central nervous system is the brain and spinal cord, while the peripheral nervous system includes everything else. The central nervous system’s responsibilities involve receiving, processing, and responding to sensory information. Responses, sensations,…
Overview Your lymphatic system is a network of organs, veins, and tissues that protect you from infection and maintain a healthy fluid balance throughout your body. Your bone marrow, thymus, and lymph nodes are all lymphatic system organs. Swollen lymph nodes are a symptom of both common infections, such as strep throat, and more serious…
Introduction Cellular organelles are specialized structures within eukaryotic cells that perform various essential functions to maintain the cell’s integrity and carry out specific tasks. These microscopic compartments act like miniature factories, each with a unique role in the overall functioning of the cell. Organelles are enclosed by membranes, similar to the cell’s outer plasma membrane,…
What is a Muscles Of Eye? The human eye is a complex organ responsible for vision, consisting of various muscles that facilitate its movement and function. These muscles play a crucial role in controlling the movement of the eye, allowing us to focus on objects, perceive depth and distance, and track moving targets. The six…
Definition The Immune System is the body’s mechanism for preventing or inhibiting infection. It can protect the body against bacteria, viruses, parasites, and more because of its intricate network of cells, organs, proteins, and tissues. A working immune system can provide the difference between healthy tissue and foreign molecules. If an undesirable material, it will…
Overview The Ventricles of the Brain are a connecting network of cavities inside the brain parenchyma that are filled with cerebrospinal fluid (CSF). The ventricular system is made up of two lateral ventricles, a third ventricle, the cerebral aqueduct, and a fourth ventricle (as shown in the figures below). The choroid plexuses in the ventricles…
