Discussion: An 11-year-old boy presents to the emergency room (ER) with a 4-inch laceration on his right arm. He was with his friends doing bicycle stunts when he fell off his bike and cut his arm on a rusty nail from the ramp. In addition, his wrist is swollen, bruised, tender to touch, and warm, with limited mobility. He will most likely need stitches to close the laceration and a splint for the sprain

Discussion: An 11-year-old boy presents to the emergency room (ER) with a 4-inch laceration on his right arm. He was with his friends doing bicycle stunts when he fell off his bike and cut his arm on a rusty nail from the ramp. In addition, his wrist is swollen, bruised, tender to touch, and warm, with limited mobility. He will most likely need stitches to close the laceration and a splint for the sprain

Discussion: An 11-year-old boy presents to the emergency room (ER) with a 4-inch laceration on his right arm. He was with his friends doing bicycle stunts when he fell off his bike and cut his arm on a rusty nail from the ramp. In addition, his wrist is swollen, bruised, tender to touch, and warm, with limited mobility. He will most likely need stitches to close the laceration and a splint for the sprain

Introduction

An 11-year-old boy presents to the emergency room (ER) with a 4-inch laceration on his right arm. He was with his friends doing bicycle stunts when he fell off his bike and cut his arm on a rusty nail from the ramp. In addition, his wrist is swollen, bruised, tender to touch, and warm, with limited mobility. He will most likely need stitches to close the laceration and a splint for the sprain.

ORDER A CUSTOMIZED, PLAGIARISM-FREE Discussion: An 11-year-old boy presents to the emergency room (ER) with a 4-inch laceration on his right arm. He was with his friends doing bicycle stunts when he fell off his bike and cut his arm on a rusty nail from the ramp. In addition, his wrist is swollen, bruised, tender to touch, and warm, with limited mobility. He will most likely need stitches to close the laceration and a splint for the sprain HERE

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Discussion Guidelines

Initial Post

In your initial post, answer the following questions:

After treatment, as he prepares to leave, you give him last-minute care instructions for laceration and sprain. What would be important for this boy to know to prevent further health concerns with his injuries?

The boy concernedly asks you, “My uncle lost his foot because he got gangrene in it. Am I going to lose my arm if I get an infection in this cut?” How would you respond?

Response Post(s)

Reply to at least two of your classmates’ initial posts by Sunday.

Submission

Post your initial and follow up responses and review full grading criteria on the Discussion 14.1: Disorders of Musculoskeletal Function: Trauma, Infection, Neoplasms page.

Lesson 1: Musculoskeletal Structure, Function, and Disorders

The purpose of this lesson is to understand the roles of the musculoskeletal systems, how they function and are regulated, and to describe dysfunction associated with each system.

Learning Outcomes

At the end of this lesson, you will be able to:

Bone Structure and Function

Describe bone development and classification

Explain bone deposition and resorption, and how this process is regulated

Muscle Structure and Function

Describe the function of muscles, and the properties of muscle that allow them to function as they do

Describe muscle morphology from the microscopic level to the macroscopic level. The student should be able to define, and understand the role of, the terms: sarcomere, actin, myosin, troponin, tropomyosin, t-tubule system, sarcoplasmic reticulum, and neuromuscular junction

Explain how muscle contraction occurs

Describe a motor unit, which is the motor neuron and all the muscle fibers (cells) it innervates

Explain muscle metabolism

Describe the clinical role or use of neuromuscular blocking agents, cholinesterase inhibitors, and anti-muscarinics

Muscular Disorders

Understand that muscular dystrophy is caused by a metabolic defect. The student should learn that muscular dystrophic conditions are classified by the mode of inheritance, the speed of onset, the area initially affected, and the rate of progression

Compare and contrast physiologic and pathologic contractures

Describe three muscle metabolic disorders that are caused by alterations to energy sources

Compare myotonic disorders and periodic paralysis resulting from hyperexcitable membranes

Bone Disorders

Characterize the abnormalities associated with developmental dysplasia of the hip and methods of diagnosis and treatment

Differentiate between congenital, idiopathic, and neuromuscular scoliosis

Define osteopenia and osteoporosis

List the risk factors associated with osteoporosis, and describe how the condition is diagnosed and treated

Compare and contrast the bone softening disorders osteomalacia, rickets, and Paget’s disease

Before attempting to complete your learning activities for this week, review the following learning materials:

Learning Materials

Read the following in your Porth’s Pathophysiology: Concepts of Altered Health States textbook:

Chapter 47, “Structure and Function of the Musculoskeletal System”

Chapter 48, “Disorders of Musculoskeletal Function: Trauma, Infection, Neoplasms”

Note that the Musculoskeletal Disorders presentation does not follow linearly from the book chapters.