Anatomy & Physiology 1
Unit 4 Case Study
Case of the Toewalker
Parents of a 3-year-old boy noticed that their son
was walking "on his toes," had a waddling gait, fell frequently and had
difficulty getting up again, and was not able to run because of the difficulty
in raising his knees. At age five, there was progressive muscular weakness and
muscle wasting. Weakness of the trunk muscles led to increased lordosis and a
protuberant abdomen. At age nine, he was confined to a wheelchair.
Contractures appeared, first in the feet, as the gastrocnemius muscles
**You will need to supply a minimum of
sentences supporting each of your answers.
1. This hereditary X-linked recessive disease
characterized by progressive muscular weakness is
2. What does dystrophy mean? Why is this term used to
describe this case?
3. What muscles would be involved in walking "on the
toes"? Which muscles are "weakening"?
4. Name the trunk muscles that weaken in certain cases
of lordosis and abdominal protuberance.
List Your Sources