The structure whose abnormal function is associated with Parkinson's disease is the
A) spinal cord.
B) basal ganglia.
C) cerebellum.
D) primary motor cortex.
E) skeletal muscle.
Answer: B
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Control of Body Movement
- After stretching an intrafusal fiber, the next event is
- When there is a resistance to the movement produced by a given limb muscle,
- Ten-year-old Tina falls while climbing a tree and lands on her back. Her frightened parents take her to the local emergency room where she is examined. Her knee jerk reflex is normal and she exhibits a negative Babinski reflex. These results suggest that
- Interneurons of the corticospinal tract synapse onto
- Most reflexes are regulated by
- Which class of movement can be considered a combination of the other two?
- Most reflex movements are integrated by
- Motor neurons are sometimes inhibited by
- The "normal" contractile fibers of the muscle are also called the
- Spinal interneurons prevent muscle antagonists from interfering with an intended movement by
- It is the middle of winter and you walk over an icy patch and lose your balance. As you begin to fall, you react by extending your arms to catch yourself. In this instance, what type of reflex is occurring?
- The reflex that complements a withdrawal reflex by making compensatory adjustments on the opposite side of the body receiving the stimulus is the
- The flexion reflex
- The reflex that prevents a muscle from exerting too much tension is the
- The sensory fibers of the muscle spindle organs synapse onto
- Which is NOT true regarding autonomic reflexes?
- Which reflex is NOT controlled by the brain stem?
- Identify the FALSE statement.
- A polysynaptic reflex has at least ________ in the reflex pathway.
- The effector in a reflex is the