February‚ 2013 iWorx Lab Report 01 - Agonist/Antagonist Muscles In this first iWorx lab‚ students studied and observed agonist and antagonist muscles. Agonist‚ which are also known as prime movers‚ are the main muscles that are responsible for bringing two bones closer. The antagonist‚ is the muscle that relaxes as the agonist contracts. The lab was a physical example to show students which muscle was which. It also allowed students to see how the muscle activity was recorded by an electromyogram (EMG)
Premium Electromyography Muscle Anatomy
Muscle Description Muscles of the Head: Facial Expression Origin Insertion Action bipartite muscle‚ Epicranius:includes frontalis connected by galea & occipitalis aponeurotica covers forehead‚ no bony attachments galea aponeurotica skin of eyebrows and root of raises eyebrows (as in surprise); nose wrinkles forehead skin horizontally Occipitalis back of head occipital and temporal bones galea aponeurotica pulls scalp posteriorly Corrugator supercilii
Premium Scapula Pelvis Knee
information in an editable file which can be sent to an instructor. Observations Exercise 1: Muscles of the Head and Neck Data Table 1: Movement(s) performed by each muscle for Figures 3-4.MuscleMovement(s) PerformedExample: DeltoidExample: Abducts the armFrontalisRaises eyebrowsLevator ScapulaeTilts back headMasseterElevates mandibleObicularis orisLip movementsOccipitalisFacial
Premium Extension Hip Flexion
show that measurements of muscle twitches from the easily prepared sciatic nerve/gastrocnemius preparation of the frog can allow one to perform experiments involving TWIN-PULSE FACILITATION. The advantages of measuring muscle twitches over electrophysiological parameters are as follows: 1. Students with minimal background can quickly learn to prepare the nerve/muscle preparation for physiological recording and for experimentation dealing with synaptic efficacy. 2. Muscle twitch recordings are population
Premium Nervous system Acetylcholine Action potential
REVIEW SHEET EXERCISE 2 Skeletal Muscle Physiology NAME: LAB TIME/DATE:9pm.. 4.8.11 Electrical Stimulation 1. Name each phase of a typical muscle twitch‚ and‚ on the following line‚ describe what is happening in each phase. a. Latent-stage from rest to muscle tension begins b. Contraction-At this stage the muscle reaches its peak in contraction c. Relaxation- muscle is shortened‚ returns to zero and back initial length. 2. In Activity 2‚ how long was the latent period? ___2
Premium Muscular system Muscle contraction Skeletal muscle
Exercise 2: Skeletal Muscle Physiology Worksheet Single Stimulus Activity 1: Identifying the Latent Period 1. How long is the latent period? 2.78 msec 2. Does the latent period change with different stimulus voltages?No Activity 2: Identifying the Threshold Voltage 1. What do you see in the Active Force display?I saw a very slight peak at .8 2. What is the threshold voltage? .8 V 3. How does the graph generated at the threshold voltage differ from the graphs generated
Premium Skeletal muscle Mass Muscle
Virtual lab 9 Activity 2: Determining the Latent Period 1. How long is the latent period? 2.78 msec. 2. What occurs in the muscle during this apparent lack of activity? Ca++ is being released from the sacroplasmic reticulum and filament movement is taking up slack. Activity 3: Investigating Graded Muscle Response to Increased Stimulus Intensity 1. Use your graph to answer and note that the dot in the graph turns red when you select that line in the table. What is the minimal‚ or threshold
Premium Muscular system Muscle contraction Orders of magnitude
Muscles to know of Powerpoint Test Head and Neck Epicranius Frontalis Epicranius Occipitalis Orbicularis Oculi Orbicularis Oris Buccinator Zygomaticus Platysma Masseter Temporalis Sternocleidomastoid Splenius Capitis Semispinalis Capitis Abdomen Rectus Abdominis External Oblique Internal Oblique Transverse Abdominis Lower Leg Gastrocnemius Tibialis Anterior Soleus Arms Biceps Brachii Brachialis Triceps Brachii Brachioradialis Flexor Carpi Radialis Flexor Carpi Ulnaris Extensor Carpi
Premium Extension
Stimuli on Simple Muscle Twitch. Introduction: Skeletal muscle is a type of striated muscle that is attached to skeleton to facilitate movement by applying force to bones and joints through contraction. Skeletal muscle generally contract voluntarily when stimulated by the nerve‚ although they can also contract involuntarily at times. Muscle action is controlled by the Nervous System. Nerves are in touch with muscle by motor end plates which convey a stimulus to contract. Muscle activity is not
Free Muscle Muscular system Muscle contraction
Influence of dietary state and insulin on myocardial‚ skeletal muscle and brain [18F]fluorodeoxyglucose kinetics in mice Michael C Kreissl1‚2*‚ David B Stout3‚ Koon-Pong Wong1‚ Hsiao-Ming Wu1‚ Evren Caglayan4‚ Waldemar Ladno3‚ Xiaoli Zhang1‚ John O Prior1‚5‚ Christoph Reiners2‚ Sung-Cheng Huang1 and Heinrich R Schelbert1 Abstract Background: We evaluated the effect of insulin stimulation and dietary changes on myocardial‚ skeletal muscle and brain [18F]-fluorodeoxyglucose (FDG) kinetics and uptake
Premium Metabolism Cardiac muscle