Revision

Which of the following best describes the reflex arc & muscle response of the Golgi Tendon Organ?

• Monosynaptic reflex arc-relaxation of muscle

• Monosynaptic reflex arc-contraction of muscle

• Disynaptic reflex arc-relaxation of muscle

• Polysynaptic arc-relaxation of muscle

Which of the following has the greatest area of representation in the primary motor cortex?

• Hip

• Thumb

• Toes

• Trunk

Neurologic disease associated with the cerebellum produces which of the following types of symptoms ?

• Resting tremor only

• Athetosis and resting tremor

• Ataxia & dysmetria

• Rigidity & resting tremor

The neurons located in the substantia nigra release which of the following neurotransmitters?

• Norepinephrine

• Serotonin

• Dopamine

• Acetylcholine

In which type of neuron does the axon form synaptic junctions with skeletal muscle cells (intrafusal fibers) within the muscle spindles?

• alpha motor neuron

• pyramidal neuron

• gamma motor neuron

• Purkinje cells

Which cells receive direct synaptic input from Golgi Tendon Organs?

• Type Ia inhibitory interneurons

• Dynamic gamma motor neurons

• alpha motor neurons

• Type Ib inhibitory interneurons

All the following stuctures are part of the basal ganglia EXCEPT

• Caudate nucleus

• Red nucleus

• Substantia Nigra

• Putamen

The phenomenon of decerebrate rigidity can be explained. at least in part, by which of the following?

• Unopposed activity of the pontine reticular nuclei

• Loss of cerebellar inputs to the red nucleus

• Overeactivity of the medullary reticular nuclei involved in motor control.

• Degeneration of the nigrostriatal pathway