Case Study. A 64-year-old male presents to the clinic with complaints of gradual onset of weakness to the left hand. He is left hand dominant. He has had ongoing numbness and tingling that feels as though it starts at his elbow. However, over the past 2-3 days he had been dropping items due to the weakness. He denies any recent injuries but state that he sustained a crushing injury to the left thumb 4 years ago. He is employed as a mechanic. Several years ago, he tripped over a tire and fell backwards striking his head on the fender of a car. He didn’t seek medical attention because he only had a small scrape on his elbow. A CT of the head is within normal limits and all labs are normal with the exception of a slightly elevated, non-fasting blood sugar (135). He has no history of diabetes. An x-ray of the neck reveals mild-to-moderate degenerative disc disease at C6-C7 with neuroforaminal narrowing and slight impingement of the exiting nerve root.

The Assignment (1- to 2-page case study analysis)

In your Case Study Analysis related to the scenario provided, explain the following:

Both the neurological and musculoskeletal pathophysiologic processes that would account for the patient presenting these symptoms.

Any racial/ethnic variables that may impact physiological functioning.

How these processes interact to affect the patient.

Case Study Analysis: Neurological and Musculoskeletal Pathophysiologic Processes Impacting a 64-year-old Male Presenting with Left Hand Weakness


This case study presents a 64-year-old male mechanic with a history of left thumb crushing injury and head trauma. The patient complains of gradual onset weakness in his left hand, along with numbness and tingling starting at his elbow, resulting in dropping items recently. The following analysis will delve into the neurological and musculoskeletal pathophysiologic processes that underlie these symptoms, considering potential racial/ethnic variables impacting physiological functioning and exploring the interactions between these processes.

Neurological Pathophysiologic Processes:

The patient’s neurological symptoms, including weakness, numbness, and tingling, are indicative of peripheral neuropathy. Peripheral neuropathy is characterized by damage to peripheral nerves and is often associated with nerve compression, entrapment, or injury, as observed in this case. The mild-to-moderate degenerative disc disease at C6-C7, neuroforaminal narrowing, and impingement of the exiting nerve root identified in the neck x-ray are potential sources of nerve compression and irritation.

The previous crushing injury to the left thumb and the head trauma might have caused nerve damage, leading to nerve dysfunction over time. Neurological examinations and imaging studies, such as CT scans, play a crucial role in identifying these pathophysiologic processes and their locations, enabling clinicians to assess the extent of nerve involvement.

Musculoskeletal Pathophysiologic Processes:

The musculoskeletal pathophysiologic processes in this case are likely related to the degenerative disc disease and neuroforaminal narrowing at C6-C7. Degenerative disc disease is a progressive condition that involves the deterioration of intervertebral discs, leading to reduced disc height and potential nerve compression. This process can create a cascade of effects, such as inflammation and structural changes in surrounding tissues.

Additionally, the crushing injury to the left thumb sustained four years ago might have resulted in residual musculoskeletal damage. Muscular weakness, especially in a mechanic who constantly uses his hands for manual tasks, could exacerbate symptoms and contribute to the difficulties experienced by the patient.

Racial/Ethnic Variables Impacting Physiological Functioning:

Racial/ethnic variables may have an impact on physiological functioning, although specific data on this aspect in the context of this case study are limited. Studies have suggested that certain racial and ethnic groups may have a higher prevalence of conditions like degenerative disc disease, neuropathy, or diabetes, which could affect the presentation and severity of symptoms. For instance, some studies have shown that individuals of African descent might have an increased risk of developing diabetic neuropathy, while others have reported ethnic variations in the prevalence of degenerative disc disease.

Interactions between Neurological and Musculoskeletal Processes:

The neurological and musculoskeletal pathophysiologic processes interact in this case. The degenerative disc disease at C6-C7 and the resulting neuroforaminal narrowing contribute to nerve compression, exacerbating the peripheral neuropathy symptoms. Moreover, the previous left thumb injury and head trauma may have caused musculoskeletal abnormalities, adding to the overall symptom burden.

In conclusion, this case study highlights the intricate interplay between neurological and musculoskeletal pathophysiologic processes in a 64-year-old male mechanic presenting with left hand weakness, numbness, and tingling. The degenerative disc disease and neuroforaminal narrowing at C6-C7, along with previous injuries, provide insights into the underlying mechanisms of the patient’s symptoms. The potential impact of racial/ethnic variables on physiological functioning warrants further investigation. Comprehensive assessments and multidisciplinary approaches are crucial in managing patients with such complex clinical presentations.


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