Human Anatomy and Physiology : Injuries and Disorders

Study concepts, example questions & explanations for Human Anatomy and Physiology

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Example Questions

Example Question #5 : Help With Evaluation Methods For Muscles, Ligaments, Tendons

While testing a patient with shoulder pain, you find that he has a positive anterior slide and positive crank tests. Based on these results, what pathology is the most likely cause of his symptoms?

Possible Answers:

Glenoid labrum tear

Subscapularis tendon tear

Teres minor tendon tear

Clavicle fracture

Acromioclavicular ligament sprain

Correct answer:

Glenoid labrum tear

Explanation:

The anterior slide and crank tests are tests for tears of the glenoid labrum. The following are common tests, with varying diagnostic value, for the other pathologies listed: O'Brien's test (acromioclavicular ligament injury), horn blower's sign (teres minor tear), lift off sign (subscapularis tear), and olecranon-manubrium-percussion test (clavicle fracture).

Example Question #6 : Help With Evaluation Methods For Muscles, Ligaments, Tendons

A patient comes to you complaining of hip pain. After preforming your exam, you suspect she has avulsed her sartorius from its origin. You order some diagnostic imaging to confirm your diagnosis.

Based on these suspicions, you would expect imaging to show injury to which bony prominence?

Possible Answers:

Ischial ramus

Anterior superior iliac spine (ASIS)

Ischial tuberosity

Tibial tuberosity

Anterior inferior iliac spine (AIIS)

Correct answer:

Anterior superior iliac spine (ASIS)

Explanation:

The origin of the sartorius Anterior superior iliac spine (ASIS). Accordingly, if the sartorius avulsed from its origin, we would suspect damage to this bony prominence.

Example Question #7 : Help With Evaluation Methods For Muscles, Ligaments, Tendons

Your patient’s x-ray shows a “Terry Thomas/David Letterman” sign. This finding suggests injury to which structure?

Possible Answers:

Triangular fibrocartilage complex

Anterior talofibular ligament

Radial collateral ligament of the wrist

Scahpolunate ligament

Ulnar collateral ligament of the wrist

Correct answer:

Scahpolunate ligament

Explanation:

The "Terry Thomas/David Letterman" sign is specific to the articulations of the wrist, and involves injury to the scapholunate ligament. When this ligament is damaged, the scaphoid and lunate drift apart, creating a gap on x-rays reminiscent of  the gap in Terry Thomas'/David Letterman's front teeth.

Example Question #8 : Help With Evaluation Methods For Muscles, Ligaments, Tendons

A patient comes to you complaining of knee pain, after playing soccer two days ago. He states that he felt a “pop” and that he is reluctant to bear weight on his injured knee.

Which of the following findings would make you think he injured his anterior cruciate ligament (ACL)?

Possible Answers:

Positive Lachman’s test

Positive Thessaly test

Positive valgus stress test

Positive McMurray’s test

Positive sag sign

Correct answer:

Positive Lachman’s test

Explanation:

Lachman's test has good diagnostic value for ACL tears. The McMurray's and Thessaly tests have mixed diagnostic value, and test for meniscus injuries, the valgus stress tests is a test for tibial collateral ligament injury, and the sag sign tests for posterior cruciate ligament (PCL) injury.

Example Question #9 : Help With Evaluation Methods For Muscles, Ligaments, Tendons

which test would be used to determine an anterior cruciate ligament (ACL) rupture?

Possible Answers:

Godfrey's (90-90)

Lachman's

Quadriceps active test

Posterior drawer

McMurray's

Correct answer:

Lachman's

Explanation:

A Lachman's test requires the clinician to apply an anterior force on the tibia, looking for an end-feel (or resistance created by the ACL). Godfrey's (90-90), posterior drawer and quadriceps active test all test for a rupture, or sprain of the posterior cruciate ligament (PCL). McMurray's tests for meniscal tear.

Example Question #10 : Help With Evaluation Methods For Muscles, Ligaments, Tendons

Which structure(s) would have a tensile force applied with hyperflexion of the knee?

Possible Answers:

Anterior cruciate ligament (ACL) and posterior cruciate ligament (PCL)

Medial collateral ligament (MCL)

Medial collateral ligament (MCL) & lateral collateral ligament (LCL)

Iliotibial band (ITB) and medial collateral ligament (MCL)

Lateral collateral ligament (LCL)

Correct answer:

Anterior cruciate ligament (ACL) and posterior cruciate ligament (PCL)

Explanation:

The anterior cruciate ligament (ACL) and posterior cruciate ligament (PCL) are both affected with hyperflexion of the knee, as these two ligaments are located deep inside the knee capsule, and prevent anterior and posterior sheering forces. If this action occurred with enough force, these structures would be injured. The sedial collateral ligament (MCL) and lateral collateral ligament (LCL) would be injured with a valgus or varus force, both with occur in the coronal plane. The iliotibial band (ITB) and and medial collateral ligament (MCL) would require multiplaner forces in order to be injured. 

Example Question #1501 : Human Anatomy And Physiology

A patient in your clinic complains of knee pain, and demonstrates a positive lever sign. The positive lever sign suggests what structure is injured?

Possible Answers:

Medial meniscus

Posterior cruciate ligament

Lateral meniscus

Anterior cruciate ligament

Correct answer:

Anterior cruciate ligament

Explanation:

Although it is a very new test, the available literature suggests that the lever sign has superior diagnostic value to the Lachman, pivot-shit, and anterior drawer tests, to detect anterior cruciate ligament (ACL) injuries. Additionally, the preliminary evidence suggests that the lever sign has high diagnostic value for both acute and chronic ACL injuries. 

Example Question #11 : Help With Evaluation Methods For Muscles, Ligaments, Tendons

Since ATP regeneration occurs through oxidative phosphorylation, we are able to calculate ATP usage during exercise by tracking the volume of oxygen flow in a test subject, and calculating the amount of oxygen used. This method of indirectly measuring ATP usage during exercise requires use to know the ratio of high energy phosphates (ATP) generated per unit of oxygen (O2).

What is the typical production ratio of high energy phosphates (ATP) per unit of oxygen (O2)?

Possible Answers:

3 ATP per O2

None of the answers are correct.

1.5 ATP per O2

32 ATP per O2

6.3 ATP per O2

Correct answer:

6.3 ATP per O2

Explanation:

Oxidative phosphorylation generates roughly 6.3 high energy phosphates (ATP) per unit of oxygen (O2).

It is also important to note that ATP generation occurs anaerobically via lactic acid production, with the ratio being 1.5 high energy phosphates (ATP) per unit of lactate. But this is not the correct answer in this context.

Example Question #1 : Immune System

Which of the following is a sign of inflammation?

Possible Answers:

Dizziness

Ataxia

Calor

Impaired vision

Correct answer:

Calor

Explanation:

Calor—or redness—is associated with increased blood flow, which can result from inflammation. During an inflammation response, histamine release results in vasodilation and increased bloodflow, which can cause the infalmmed area to appear red.

Example Question #1 : Immune System

What type of microbiota infect individuals who are already immunocompromised?

Possible Answers:

Opportunistic microbiota

Transient microbiota

Pathogens

Resident microbiota

Correct answer:

Opportunistic microbiota

Explanation:

Opportunistic microbiota can form biofilms and affect patients who are immunocompromised, suchs as someone with AIDS or a chronic illness.

Resident microbiota are always present in the body and frequently have mutualistic relationships with their human hosts. Transient microbiota are present at some times, but absent at others. Pathogens affect healthy individuals, as well as those who may be immunocompromised.

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