Osteoblast/Clast Remodeling II
We are in the post race wash rack again, eyeing our horse's cannons, and considering what occurred, what next, are there any developing fracture lines, or will the cannons remodel/strengthen as a result of the race so that possibly we'll be without these worries in the future?
What precisely is, then, bone strengthening or remodeling?
Remodeling over time (the long term) involves of course the osteoblast/clast reconstruction/deconstruction referred to last post. BUT this blog (see April '09) has also identified short term temporary remodeling processes probably restricted to equines (due to concussion) which may be reinforced over time to increase bone strength. These are:
bone glue increases in volume
contractions of the mineral matrix
compaction of newly forming bone
So, we have the processes, both long term and short term. But, it's still unknown precisely what is the end point in terms of bone structure for these processes. To have a full understanding, perhaps we need to know the manner in which the bone is strengthened.
What does this mean? Take two horses, one untrained and sedentary, the other into advanced racing. Inspect their front cannons and note the differences, if any!
Do the trained/untrained cannons e.g. differ in size, thickness, density, have stronger bonding at the molecular level, have the same or different bone glue volumes, is matrix construction the same in both sorts of cannons?
As an experiment in this regard, I look at my own three horses. The14 year old has as much track work as any. 50 of his breezes were documented on the blog, summer 20078. My 3 and 4 year olds have significant exercise but zero track work. What difference in the feel, quality and size of these cannons do I note? The result of this is very interesting.
The cannons of the 14 year old certainly have a very stout, seemingly denser, stronger feel than the youngsters. BUT, and this surprised me, there is very little difference in size among these differently trained cannon bones! The ramifications, next post!
Training:
Wed. 6/17/09. Weather OMG. Yet more rain on the way. Art trot-galloped a mile before Mr. Nob aborted due to groundd conditions. Too dangerous. Enough of that. Both horses then exercised riderless, intermittent heats at ranging to :14s for about 3 miles. Tough workout.
What precisely is, then, bone strengthening or remodeling?
Remodeling over time (the long term) involves of course the osteoblast/clast reconstruction/deconstruction referred to last post. BUT this blog (see April '09) has also identified short term temporary remodeling processes probably restricted to equines (due to concussion) which may be reinforced over time to increase bone strength. These are:
bone glue increases in volume
contractions of the mineral matrix
compaction of newly forming bone
So, we have the processes, both long term and short term. But, it's still unknown precisely what is the end point in terms of bone structure for these processes. To have a full understanding, perhaps we need to know the manner in which the bone is strengthened.
What does this mean? Take two horses, one untrained and sedentary, the other into advanced racing. Inspect their front cannons and note the differences, if any!
Do the trained/untrained cannons e.g. differ in size, thickness, density, have stronger bonding at the molecular level, have the same or different bone glue volumes, is matrix construction the same in both sorts of cannons?
As an experiment in this regard, I look at my own three horses. The14 year old has as much track work as any. 50 of his breezes were documented on the blog, summer 20078. My 3 and 4 year olds have significant exercise but zero track work. What difference in the feel, quality and size of these cannons do I note? The result of this is very interesting.
The cannons of the 14 year old certainly have a very stout, seemingly denser, stronger feel than the youngsters. BUT, and this surprised me, there is very little difference in size among these differently trained cannon bones! The ramifications, next post!
Training:
Wed. 6/17/09. Weather OMG. Yet more rain on the way. Art trot-galloped a mile before Mr. Nob aborted due to groundd conditions. Too dangerous. Enough of that. Both horses then exercised riderless, intermittent heats at ranging to :14s for about 3 miles. Tough workout.
posted by rather rapid at
10:03 AM
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