Cardiac electrophysiology

One of the main goals in the field of exercise science is to determine methods of enhancing performance during exercise or competition. When comparing methods of performance enhancement two essential theories come to mind: utilization of the stretch-shortening cycle (SSC) and post activation potentiation (PAP), which both result from pre-activation (Fukutani, Misaki & Isaka, 2016, Nibali, Chapman, Robergs & Drinkwater, 2013) The SSC focuses on increases in muscle force output through a…

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…

Section A “Selective Connexin43 Inhibition Prevents Isoproterenol-Induced Arrhythmias and Lethality in Muscular Dystrophy Mice” is a research paper that was conducted by Dr. Fraidenraich and his colleagues. Duchenne muscular dystrophy (DMD) is a severe form of muscular dystrophy that is life threatening and associated with muscle degeneration. It affects many newborn males, meaning that it is caused by an X-linked mutation. This mutation leads to the absence of a very important protein called,…

Organ Trail WebQuest Worksheet Epithelium-Tissue that covers the whole surface of the body.It has alot of cells in one or more layers. Describe the four types of tissues. Function- Epithelium tissue covers the whole surface of your body and it also protects your skin. Characteristics-The Characteristics traits covers and lines and all body surfaces. The cells are packed together and it the tissue can repair itself. Classification -The classification types are squamous,cuboidal,…

Discussion Vascular access, along with airway management is a standard of emergency care, and is an essential part of cardiopulmonary resuscitation in many groups of patients. Peripheral vascular access is the most efficient means of gaining vascular access as it’s induces minimal trauma, is the safest method of gaining access to venous circulation. It may however be difficult in stressful situations and require several attempts despite its widespread usage failure may result in prehospital…

Introduction Some of the most important organs in the human body are muscles. Muscles usually make up 30-50% of the body and are responsible for producing skeletal movement, maintaining body position, and regulating body temperature. In a lab, the process of muscle contraction was investigated by exploring the sliding filament theory. An experiment was conducted to determine whether muscle length played a role in the amount of force a muscle produces. In order to fully understand how a muscle…

primarily functions as a source of power.” A muscle is also used for movement and keeping body parts in their right positions. There are 3 different types of muscles, Skeletal which is generally the muscle connected to the bone. Then there is the Cardiac which is only found in the heart, it is responsible for pumping blood through the body. Lastly there is the smooth muscle which is the type of muscle found in our internal organs, blood…

Muscles (Grip strength) In this week’s lab, we was doing an experiment on forearm, and its muscle fiber with nerves. The forearm is a part that between the primates’ elbow and wrist. Forearms contain connective tissue, nerve tissue and muscle tissue. In which, connective tissue is just radius and ulnar bones. However, there are a great deal of muscles and nerves in the forearm. When a nerve impulse transmission to synaptosomes induced depolarization, allows calcium ions to enter the cell…

In a skeletal system joints, ligaments, and tendons all go hand in hand. A joint is defined by two or more bones that meet. However, with the use of fibrous connective tissue, ligaments allow the joints to be held together. Ligaments are what prevent us from moving in an undesirable plane, another purpose they serve is that they limit the range or extent of normal movement (Wallace 2013). Unlike ligaments where the bone might be attached to another, tendons are fibrous tissue connecting the…

interventricular septum.1 Walls of heart are composed of cardiac myocytes, these cells contain myofilaments, each unit is composed of contractile protein called actin and myosin.3 There are also regulatory proteins such as troponin which binds to actin filament, preventing the myosin head from binding to actin, is found within the myocytes.3 Each myofilament is surrounded by sarcoplasmic reticulum which stores calcium and adjacent cardiac myocyte are joined in an end to end…