Exam 16: Spinal Cord and Spinal Nerves

In general,nerves from the posterior division of the brachial plexus tend to innervate muscles that extend the parts of the upper limb.

A ___________ is a specific segment of skin that is supplied by a single spinal nerve.

-This figure shows the spinal cord and spinal nerves.What structure does number 3 indicate?

The spinal cord part with the largest diameter is the ___________ part.

Following an injury to his arm,a patient complains that he cannot extend the forearm,wrist,and digits.You suspect that he has damaged the

-This figure shows an anterior view of the spinal cord and meninges.What structure does number 7 indicate?

In a lumbar puncture (spinal tap),fluid is extracted from the

The simple knee-jerk reflex is an example of a(n)_____ reflex.

The posterior ramus of a typical spinal nerve innervates the

There is no delay between stimulus and response in a polysynaptic reflex.

A spinal nerve contains

This structure contains unmyelinated axons and serves as a communication route between the right and left sides of the gray matter in the spinal cord.

The simplest reflex is the _____ reflex.

In the brain,the outer cerebral cortex consists of gray matter,but in the spinal cord,gray matter is confined to the innermost regions.

Nuclei within the gray matter of the spinal cord that receive information from sensory receptors such as pain or pressure receptors in the skin are _____ nuclei.

What reflex flexes the toes when the inferior surface of the foot is stroked?

What is the correct order for the parts of the spinal cord,from superior to inferior?

The anterior rami of T1-T11 are called

Stepping on a piece of glass would most likely invoke a _____ reflex.

The plexus formed from the anterior rami of L4-S4 is the ________ plexus.