Final answer:
The pull of the psoas muscle can cause fractures, especially when abdominal forces are weakened, and bones are abnormally weak. These fractures can take various forms, such as transverse, oblique, spiral, comminuted, and impacted, depending on the stress and trauma the bone is subjected to.
Step-by-step explanation:
Fractures in bones can occur from various mechanisms, including the pull of muscles such as the psoas. When abdominal forces are weakened, it could contribute to this issue. Particularly, if bones are abnormally weak, they are more prone to breakage and fracturing, even upon mild trauma. Situations with severe conditions may result in abnormal bone formation, with bones being thinner, shorter, and potentially leading to a shorter stature. Moreover, the types of bone fractures can vary greatly, such as transverse fractures that occur straight across the long axis of the bone, oblique fractures at an angle, spiral fractures from twisting motions, comminuted fractures with several breaks creating small pieces between large segments and impacted fractures where one fragment is driven into another due to compression.