Exam 6: The Sensorimotor System

Lesions of the _______ system generally do not cause paralysis, but they usually exaggerate spinal reflexes.

EMG studies have revealed that a voluntary movement of the arm, for example, when asked to pull a lever, is immediately preceded by

The SMA appears to be especially active

The pyramidal motor system begins in the _______ cortex, and the pathway then travels to the _______ and then the _______.

_______ neurons are very active in people with synesthesia.

The onion-like receptor found in skin that selectively responds to vibration and pressure is the

Which receptor is likely to respond to an overload that threatens to tear muscles or ligaments?

Cannabis reduces pain by

Plunging your hand into a bucket of cold water activates skin receptors called _______.

A delta (A $\delta$ ) fibers can rapidly transmit pain information to the brain because

A _______ is a skin receptor type that is especially sensitive to stretching of the skin.

Mice that lack substance P exhibit

Discuss phantom limb pain and give at least one example of a therapy that may help to alleviate it.

It is thought that TENS may affect pain relief by causing release of endogenous opioids because naloxone

Plasticity of somatosensory cortical maps is evident following

Discuss the following statement: "The homunculus is a useful tool for understanding the primary motor and somatosensory cortices."

Lesions of the extrapyramidal system typically interfere with spinal reflexes by

The supplementary motor cortex and the premotor cortex together make up the _______ motor cortex.

A person is suffering from acute pain and describes it to the doctor as "constant, dull throbbing." That description falls into the _______ dimension of the pain experience.

One possibility for opioid mechanism is that action in the _______ causes descending fibers from the brainstem to directly inhibit dorsal horn cells that transmit _______ information.