Class Notes (806,817)
Canada (492,453)
Kinesiology (2,940)


4 Pages
Unlock Document

Western University
Kinesiology 1080A/B
Matthew Heath

Kinesiology 1080 – Feb. 6, 2013 Apraxia: a disorder of learned, skilled purposeful movement not related muscle paralysis or comprehension deficits:  Ideational apraxia: it is the inability to evoke the appropriate action representation from long-term memory; they are unable to produce memories to allow them to produce movement (eg. Picking up a glass of water, they literally forget how to move)  Ideomotor apraxia: It is the inability to translate the appropriate innervatory patterns into action (eg. Picking up a cup of water: they know exactly how to do it, but cannot use their knowledge to produce the movement  they can’t translate knowledge into the neural signals to produce that movement  This can be both chronic (long-term) or short-term New form of Apraxia: Case of CK - This is due to a large stroke in the front parietal lobe from possibly taking birth control pills - The patient was able to demonstrate actions from memory and off of imitation, but as soon as an object was placed in her hand to perform the movement, her movement become unbalanced and uncontrolled  Somatosensory form of Apraxia  It is the most profound type of apraxia  This is because it has impaired her ability to perform movements in her left and right hand  Since the parietal lobe is sensory to motor interface, it could be that her somatosensory system is too highly tuned  leading to amplified signals, thus, the motor system does not know what to do and the movement becomes uncoordinated and uncontrolled  Therefore, a lesion to the right parietal lobe leads to a deficit to the sensory motor interface  Apraxia is believed to be the result of closed head injury Dyspraxia: Developmental in nature - It is a developmental coordinate disorder (DCD) “clumsy children”  dyspraxic movement impairment - It is a soft issue related to the development of the cortex; no stroke is involved - DCD  it is generally identified because of the characteristic deficit to the timing of movement - It is very evident in spoken language - As the individual grows older, they are usually able to grow out of it as their system develops Cerebral Asymmetries in Down Syndrome  Down syndrome characteristics:  Individuals have a much smaller brain, probably to match their the size of the body because they are generally smaller  Too small for their age  The cerebellum is particularly smaller  Behavioural Characteristics:  Approximately 90% of the people are right-hand dominant  Out of those 90%, 99% of them are left-hemisphere dominant for speech and language  90% of left-hand dominant also have speech and language lateralized to the left- hemisphere  Approximately, 50% of the people with down syndrome are left-handed  Linkage between hand dominance and language lateralization?  It was studied using a FMRI  The Vernicke’s area in the left hemisphere activates when a normal person hears speech sounds (speech perception)  Most people who have Down Syndrome, the right hemisphere is activated during the perception of speech  Model of Reversed Cerebral Specialization  Everything lateralized to left or right is flipped in Down Syndrome  According to this, the speech production should be flipped to the right side; however, just like the general population, the speech production was lateralized to the left cerebral hemisphere  This model was quickly disproven, because everything else other than speech perception was lateralized to the same side  Therefore, people with Down Syndrome have separation between speech production and speech perception  They have to take the verbal information (process in the side), and transport it to the
More Less

Related notes for Kinesiology 1080A/B

Log In


Don't have an account?

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.