Week 3 Muscle Neuro Assignment 3 PDF
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Susan Demeter
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Summary
This document contains assignment questions on muscle physiology, including excursion calculations, muscle actions in insufficiency and the role of calcium in muscle contraction. It also discusses the role of muscle spindles and neurotransmission.
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**Name: \_\_\_\_\_\_\_\_Susan Demeter\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_** **Assignment 3** 1. If a muscle's normal length is 20 cm and it can be stretched to 25 cm and fully contract to 16 cm, what is the excurs...
**Name: \_\_\_\_\_\_\_\_Susan Demeter\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_** **Assignment 3** 1. If a muscle's normal length is 20 cm and it can be stretched to 25 cm and fully contract to 16 cm, what is the excursion of a muscle? How do you calculate it? 20-16=4 5+4=9cm 2. Explain how could you put the triceps brachii and iliopsoases, in passive insufficiency? - Triceps brachii- full flexion in shoulder and elbow - Iliopsoases- full extension of hip and knee in full flexion. 3. How would you put the sternocleidomastoid and rectus femoris in active insufficiency? - Sternocleidomastoid- full flexion of neck - rectus femoris- flexion at hip and knee 4. Your patient is internally rotating their shoulder. List the names of the muscles that are the agonist and the antagonist. Teres major posterior deltoid fibers Latissimus Dorsi Infraspinatus Subscapularis Teres minor Pectoralis Major Anterior deltoid fibers 5. Explain the role of calcium in regard to a muscle contraction in an outline format. 6. Explain how a muscle spindle can provided sensory information to the brain when the muscle is placed in a shorten position. 7. Outline the process how proprioceptive information in your right hand will travel to the cerebral cortex. 8. Outline the process of a never impulse traveling to the axon terminal can cause another nerve to reach an action potential. -Action potential reaches axon terminal causing depolarization. -Calcium enters, which cause neurotransmitters to release into synaptic cleft. -Neurotransmitters travel across synaptic clef, which binds to receptors on postsynaptic membrane. -Stimulus from sensory cell depolarizes target neuron to its threshold potential. -AP occurs.
