White matter tracts that connect the cerebral hemi

ATI LPN

ATI LPN Test Bank

White matter tracts that connect the cerebral hemispheres and allow communication between them are called:

A. Projection tracts B. Association tracts C. Commissural tracts D. Relay tracts

Correct Answer: C

Rationale: Commissural tracts (e.g., corpus callosum) connect the two cerebral hemispheres. [Level: Knowledge]

White matter in the spinal cord primarily contains:

A. Cell bodies and dendrites B. Myelinated axons C. Unmyelinated axons D. Synaptic terminals

Correct Answer: B

Rationale: White matter consists of myelinated axons forming tracts. [Level: Knowledge]

Upper Motor Neurons from the motor cortex synapse with Lower Motor Neurons in the:

A. Dorsal horn B. Ventral horn C. Grey commissure D. Lateral horn

Correct Answer: B

Rationale: UMNs synapse with LMNs in the ventral horn for motor output. [Level: Knowledge]

Which plexus contributes to the innervation of the diaphragm?

A. Cervical plexus B. Brachial plexus C. Lumbar plexus D. Sacral plexus

Correct Answer: A

Rationale: The cervical plexus (C3-C5) gives rise to the phrenic nerve for the diaphragm. [Level: Knowledge]

The trigeminal nerve (V) is involved in:

A. Controlling eye movements B. Chewing and facial sensation C. Hearing D. Taste sensation

Correct Answer: B

Rationale: The trigeminal nerve (CN V) mediates chewing (motor) and facial sensation (sensory). [Level: Knowledge]

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