On which brain systems are responsible for sequence control it is likely to
involve the basal ganglia.
This week Ann Graybiel will recieve the prestigious Natational Medal of
Science for this work.
Here is an abstract from a recent review. It is unabashed S-R thinking.
Following that i'll include the title and 1st paragraph from another recent
review.
The basal ganglia and chunking of action repertoires.
Neurobiol Learn Mem (Neurobiology of learning and memory.) 1998
Jul-Sep; 70(1-2):119-136.
The basal ganglia have been shown to contribute to habit and
stimulus-response (S-R) learning. These forms of
learning have the property of slow acquisition and, in humans, can occur
without conscious awareness. This paper proposes that one aspect of basal
ganglia-based learning is the recoding of cortically derived information
within the striatum. Modular corticostriatal projection patterns,
demonstrated experimentally, are viewed as
producing recoded templates suitable for the gradual selection of new
input-output relations in cortico-basal ganglia loops. Recordings from
striatal projection neurons and interneurons show that activity patterns in
the striatum are modified gradually during the course of S-R learning. It
is proposed that this recoding within the
striatum can chunk the representations of motor and cognitive action
sequences so that they can be implemented as performance units. This scheme
generalizes Miller's notion of information chunking to action
control. The formation and the efficient implementation of action chunks
are viewed as being based on predictive
signals. It is suggested that information chunking provides a mechanism for
the acquisition and the expression of action repertoires that, without such
information compression would be biologically unwieldy or difficult to
implement. The learning and memory functions of the basal ganglia are thus
seen as core features of the basal ganglia's influence on motor and
cognitive pattern generators.
Trends Cogn Sci 2001 Nov 1;5(11):487-494
Perspectives and problems in motor learning.
Wolpert DM, Ghahramani Z, Flanagan JR.
Sobell Dept of Neurophysiology, Institute of Neurology, Queen Square, WC1N
3BG, London, UK
from the motor chauvinist's point of view the entire purpose of the human
brain is to produce movement. Movement is the only way we have of
interacting with the world. All communication, including speech, sign
language, gestures and writing, is mediated via the motor system. All
sensory and cognitive processes may be
viewed as inputs that determine future motor outputs.
On which brain systems are responsible for sequence control it is likely to
involve the basal ganglia.
Interesting.
I don't see anything in this abstract about sequences, so I guess there must be something in the body of the paper to support your conjecture that sequence control must involve the basal ganglia.
It seems clear to me that S-R research is validly about learning, but does not license conclusions about how behavior reflecting what has been learned is executed. On this view, 'cognitive pattern generators', 'representations of motor and cognitive action sequences', 'predictive signals', and 'action repertoires' are interpretations that have been misguided by theories of behavior built up from observations of learning under constraint and under duress. It may even be that the notion of cortical signal patterns being recorded as 'corticostriatal projection patterns' is an over-interpretation of the data. Setting all this froofra aside maybe we can salvage something useful about learning, about the location of reorganization in the striatum, and about the development of control loops involving the cortex and the basal ganglia.
Is there any indication that what she is talking about are what we think of as 'event' control? Well-learned sequences learned as sequences at the cortical level and then through a learning process 'encoded' as events in the striatum?
/Bruce
···
At 01:32 PM 6/11/2002 -0400, Isaac Kurtzer wrote:
At 01:32 PM 6/11/2002 -0400, Isaac Kurtzer wrote:
i.kurtzer (2002.06.11.1300)
On which brain systems are responsible for sequence control it is likely to
involve the basal ganglia.
This week Ann Graybiel will recieve the prestigious Natational Medal of
Science for this work.
Here is an abstract from a recent review. It is unabashed S-R thinking.
Following that i'll include the title and 1st paragraph from another recent
review.
The basal ganglia and chunking of action repertoires.
Neurobiol Learn Mem (Neurobiology of learning and memory.) 1998
Jul-Sep; 70(1-2):119-136.
The basal ganglia have been shown to contribute to habit and
stimulus-response (S-R) learning. These forms of
learning have the property of slow acquisition and, in humans, can occur
without conscious awareness. This paper proposes that one aspect of basal
ganglia-based learning is the recoding of cortically derived information
within the striatum. Modular corticostriatal projection patterns,
demonstrated experimentally, are viewed as
producing recoded templates suitable for the gradual selection of new
input-output relations in cortico-basal ganglia loops. Recordings from
striatal projection neurons and interneurons show that activity patterns in
the striatum are modified gradually during the course of S-R learning. It
is proposed that this recoding within the
striatum can chunk the representations of motor and cognitive action
sequences so that they can be implemented as performance units. This scheme
generalizes Miller's notion of information chunking to action
control. The formation and the efficient implementation of action chunks
are viewed as being based on predictive
signals. It is suggested that information chunking provides a mechanism for
the acquisition and the expression of action repertoires that, without such
information compression would be biologically unwieldy or difficult to
implement. The learning and memory functions of the basal ganglia are thus
seen as core features of the basal ganglia's influence on motor and
cognitive pattern generators.
Trends Cogn Sci 2001 Nov 1;5(11):487-494
Perspectives and problems in motor learning.
Wolpert DM, Ghahramani Z, Flanagan JR.
Sobell Dept of Neurophysiology, Institute of Neurology, Queen Square, WC1N
3BG, London, UK
From the motor chauvinist's point of view the entire purpose of the human
brain is to produce movement. Movement is the only way we have of
interacting with the world. All communication, including speech, sign
language, gestures and writing, is mediated via the motor system. All
sensory and cognitive processes may be
viewed as inputs that determine future motor outputs.