Procedure Bstructure Of The Spinal Cord

1. Review a textbook section on the spinal cord.

2. As a review activity, label figures 27.1, 27.2, and 27.3.

3. Complete Parts B and C of the laboratory report.

4. Obtain a prepared microscope slide of a spinal cord cross section. Use the low power of the microscope to locate the following features:

posterior median sulcus anterior median fissure central canal gray matter gray commissure posterior horn lateral horn anterior horn

Figure 27.1 Label the features of the spinal cord and the surrounding structures.

Anterior/Ventral

Spinal Cord Cross Section Not Labeled

Posterior/Dorsal

Figure 27.2 Label this cross section of the spinal cord, including the features of the white and gray matter.

Posterior/Dorsal

Human Spinal Cord Cross Section

Anterior/Ventral

Figure 27.3 Label the ascending and descending tracts of the spinal cord by placing the correct numbers in the spaces provided. (Note: These tracts are not visible as individually stained structures on microscope slides.)

Posterior/Dorsal

Figure 27.3 Label the ascending and descending tracts of the spinal cord by placing the correct numbers in the spaces provided. (Note: These tracts are not visible as individually stained structures on microscope slides.)

Spinal Cord Anatomy Labeling

11 12

11 12

Anterior/Ventral

__Anterior corticospinal tract

__Anterior reticulospinal tract

__Anterior spinocerebellar tract

__Anterior spinothalamic tract

__Fasciculus cuneatus

__Fasciculus gracilis

__Lateral corticospinal tract

__Lateral reticulospinal tract

__Lateral spinothalamic tract

__Medial reticulospinal tract

__Posterior spinocerebellar tract

__Rubrospinal tract white matter posterior funiculus lateral funiculus anterior funiculus roots of spinal nerve dorsal roots dorsal root ganglia ventral roots

5. Observe the model of the spinal cord, and locate the features listed in step 4.

6. Complete Part D of the laboratory report.

Web Quest

Describe the development of the nervous system and review the brain, cranial nerves, spinal cord, and CSF. Search these at http:// www.mhhe.com/biosci/abio/martinlmwq.mhtml

Essentials of Human Physiology

Essentials of Human Physiology

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