RE: [Chirolist-CA] ACL rupture associated with brain changes

[Guest guest]

Hey guys....check this out!

For all of you who are walking around with chronic ACLs (Dan Beeson? ;'-) ) ...... think this rings true? I'll have to watch my percentage of active medial knees for any signs of this .....

Sunny

Sunny Kierstyn, RN DC Fibromyalgia Care Center of Oregon 2677 Willakenzie Road, 7CEugene, Oregon, 97401541- 654-0850; Fx; 541- 654-0834www.drsunnykierstyn.com

> From: lucal99@...> chirolist-ca@...> Date: Wed, 30 Dec 2009 19:36:34 +0100> Subject: [Chirolist-CA] ACL rupture associated with brain changes> > All communication within this forum is private and is for the benefit of the members of this forum > and may NOT be forwarded without express permission from the list administrators.> ******************************************************************> > -It would be interesting to see if this also applied to injuries of the spine. Further studies could be done with affected limb/spinal movements and frontal cortex function. > > Arrondo> > > > > NEW YORK (Reuters Health) Dec 08 - A seemingly simple anterior> cruciate ligament (ACL) rupture can produce changes in the brain that> cause some patients to do poorly, researchers say in the December issue> of the American Journal of Sports Medicine.> > Rehabilitation> scientists have long "whispered" to one another that straightforward> joint injuries like an ACL rupture have neurophysiological dimensions,> lead researcher Dr. Eleni Kapreli told Reuters Health.> > Now,> Dr. Kapreli said, after the first functional MRI study of the brain's> adaptation to a peripheral joint injury, "we have the first strong> evidence that a peripheral joint injury causes a disturbance in> neuromuscular control, affects the central programs and consequently> the motor response, resulting in dysfunction of the injured limb."> > Dr.> Kapreli, from the Technological Educational Institution of Lamia,> Greece, and her colleagues studied 17 men (average age 25.5) with> MRI-confirmed complete ACL rupture in the right knee. The ruptures> occurred more than six months before the experiment. None of the knees> had been surgically repaired.> > All the> injured men were having difficulties due to their ACL deficiencies,> confirmed by scores less than 60% on the global rating scale, less than> 80% on the activities of daily living scale, a timed hop test less than> 80% of predicted, or episodes of the knee giving away. These men were> compared to 18 matched, healthy controls.> > ACL-deficient> subjects and controls were scanned supine with their legs in a custom> built cushion that limited flexion to 45 degrees. They flexed and> extended the knee on command (each unilateral movement condition lasted> 25 seconds, enough to obtain 10 complete brain images). "We chose this> range of motion because in such an open kinetic movement the ACL> sustains the greatest force," Dr. Kapreli said.> > Functional> MRI revealed that ACL injured subjects had increased activity in the> contralateral presupplementary motor area (pre-SMA), the contralateral> posterior secondary somatosensory area (SIIp) and the ipsilateral> posterior inferior temporal gyrus (pITG).> > These> findings contrast to the pattern in controls, where signal was> significantly higher in the primary sensorimotor areas bilaterally, the> contralateral thalamus, posterior parietal cortex, basal> ganglia-external globus pallidus, secondary somatosensory area,> cingulated motor area, premotor cortex and the ipsilateral cerebellum.> > Aside> from poor activation of the widely distributed cortical network seen in> healthy controls, which may be explained by ACL deafferentiation, the> authors place particular importance on the increased activation of the> pITG area in the ACL patients.> > Located in> the visual cortex, the pITG's activation suggests that the ACL patients> need visual feedback to compensate for deficient proprioreceptive> input. Subjects were free to look at a mirror inside the scanner that> allowed them to see their legs. "It seems that healthy people did not> need to look at their moving knee whereas the patients had to look at> it in order to correctly execute the movement," Dr. Kapreli said.> > As> for the other two regions with increased signal in ACL patients, the> authors cite studies implicating SIIp's role in processing painful> stimuli. They suggest that SIIp's activation in ACL patients could> reflect the presence of pain or instability during movement. Similarly,> the pre-SMA activation could imply that injured patients' brains> require more intensive planning before knee movement, given pre-SMA's> reputed role in planning complex movements.> > Dr.> Kapreli said that now she's established that ACL injury causes changes> in cortical organization, she'd like to see if functional MRI can help> her determine how long is too long to wait for surgical repair, and> whether different rehabilitation programs can reverse the injury> induced brain changes. "It is also highly important to investigate> similar research questions in other musculoskeletal injuries."> > > Am J Sports Med 2009;37:2419-2426.> > _________________________________________________________________> Windows Live: Friends get your Flickr, Yelp, and Digg updates when they e-mail you.> http://www.microsoft.com/middleeast/windows/windowslive/see-it-in-action/social-network-basics.aspx?ocid=PID23461::T:WLMTAGL:ON:WL:en-xm:SI_SB_3:092010> ********************************************************************************> "Building Chiropractic Community through enhanced communication."> > To change your preferences or unsubscribe:> http://ww3.chirolists.com/mailman/listinfo/chirolist-ca> email: Chirolist-CA-request@...?subject=unsubscribe> List options tutorial:> http://www.chirolists.com/index.cfm?nid=6> Email filters tutorial:> http://www.chirolists.com/index.cfm?nid=7> ********************************************************************************* Hotmail: Trusted email with Microsoft’s powerful SPAM protection. 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[Guest guest]

Hey guys....check this out!

For all of you who are walking around with chronic ACLs (Dan Beeson? ;'-) ) ...... think this rings true? I'll have to watch my percentage of active medial knees for any signs of this .....

Sunny

Sunny Kierstyn, RN DC Fibromyalgia Care Center of Oregon 2677 Willakenzie Road, 7CEugene, Oregon, 97401541- 654-0850; Fx; 541- 654-0834www.drsunnykierstyn.com

> From: lucal99@...> chirolist-ca@...> Date: Wed, 30 Dec 2009 19:36:34 +0100> Subject: [Chirolist-CA] ACL rupture associated with brain changes> > All communication within this forum is private and is for the benefit of the members of this forum > and may NOT be forwarded without express permission from the list administrators.> ******************************************************************> > -It would be interesting to see if this also applied to injuries of the spine. Further studies could be done with affected limb/spinal movements and frontal cortex function. > > Arrondo> > > > > NEW YORK (Reuters Health) Dec 08 - A seemingly simple anterior> cruciate ligament (ACL) rupture can produce changes in the brain that> cause some patients to do poorly, researchers say in the December issue> of the American Journal of Sports Medicine.> > Rehabilitation> scientists have long "whispered" to one another that straightforward> joint injuries like an ACL rupture have neurophysiological dimensions,> lead researcher Dr. Eleni Kapreli told Reuters Health.> > Now,> Dr. Kapreli said, after the first functional MRI study of the brain's> adaptation to a peripheral joint injury, "we have the first strong> evidence that a peripheral joint injury causes a disturbance in> neuromuscular control, affects the central programs and consequently> the motor response, resulting in dysfunction of the injured limb."> > Dr.> Kapreli, from the Technological Educational Institution of Lamia,> Greece, and her colleagues studied 17 men (average age 25.5) with> MRI-confirmed complete ACL rupture in the right knee. The ruptures> occurred more than six months before the experiment. None of the knees> had been surgically repaired.> > All the> injured men were having difficulties due to their ACL deficiencies,> confirmed by scores less than 60% on the global rating scale, less than> 80% on the activities of daily living scale, a timed hop test less than> 80% of predicted, or episodes of the knee giving away. These men were> compared to 18 matched, healthy controls.> > ACL-deficient> subjects and controls were scanned supine with their legs in a custom> built cushion that limited flexion to 45 degrees. They flexed and> extended the knee on command (each unilateral movement condition lasted> 25 seconds, enough to obtain 10 complete brain images). "We chose this> range of motion because in such an open kinetic movement the ACL> sustains the greatest force," Dr. Kapreli said.> > Functional> MRI revealed that ACL injured subjects had increased activity in the> contralateral presupplementary motor area (pre-SMA), the contralateral> posterior secondary somatosensory area (SIIp) and the ipsilateral> posterior inferior temporal gyrus (pITG).> > These> findings contrast to the pattern in controls, where signal was> significantly higher in the primary sensorimotor areas bilaterally, the> contralateral thalamus, posterior parietal cortex, basal> ganglia-external globus pallidus, secondary somatosensory area,> cingulated motor area, premotor cortex and the ipsilateral cerebellum.> > Aside> from poor activation of the widely distributed cortical network seen in> healthy controls, which may be explained by ACL deafferentiation, the> authors place particular importance on the increased activation of the> pITG area in the ACL patients.> > Located in> the visual cortex, the pITG's activation suggests that the ACL patients> need visual feedback to compensate for deficient proprioreceptive> input. Subjects were free to look at a mirror inside the scanner that> allowed them to see their legs. "It seems that healthy people did not> need to look at their moving knee whereas the patients had to look at> it in order to correctly execute the movement," Dr. Kapreli said.> > As> for the other two regions with increased signal in ACL patients, the> authors cite studies implicating SIIp's role in processing painful> stimuli. They suggest that SIIp's activation in ACL patients could> reflect the presence of pain or instability during movement. Similarly,> the pre-SMA activation could imply that injured patients' brains> require more intensive planning before knee movement, given pre-SMA's> reputed role in planning complex movements.> > Dr.> Kapreli said that now she's established that ACL injury causes changes> in cortical organization, she'd like to see if functional MRI can help> her determine how long is too long to wait for surgical repair, and> whether different rehabilitation programs can reverse the injury> induced brain changes. "It is also highly important to investigate> similar research questions in other musculoskeletal injuries."> > > Am J Sports Med 2009;37:2419-2426.> > _________________________________________________________________> Windows Live: Friends get your Flickr, Yelp, and Digg updates when they e-mail you.> http://www.microsoft.com/middleeast/windows/windowslive/see-it-in-action/social-network-basics.aspx?ocid=PID23461::T:WLMTAGL:ON:WL:en-xm:SI_SB_3:092010> ********************************************************************************> "Building Chiropractic Community through enhanced communication."> > To change your preferences or unsubscribe:> http://ww3.chirolists.com/mailman/listinfo/chirolist-ca> email: Chirolist-CA-request@...?subject=unsubscribe> List options tutorial:> http://www.chirolists.com/index.cfm?nid=6> Email filters tutorial:> http://www.chirolists.com/index.cfm?nid=7> ********************************************************************************* Hotmail: Trusted email with Microsoft’s powerful SPAM protection. Sign up now.