Lab 3

Question 1

Anterior median fissure

Answer 1

Deep groove in anterior of spinal cord, contains fold of pia mater

Question 2

Posterior median sulcus

Answer 2

Shallow groove at posterior of spinal cord

Question 3

Posterior (dorsal) gray horn

Answer 3

Posterior gray matter of spinal cord, contains cell bodies of interneurons that receive sensory information from periphery

Question 4

Anterior gray horn

Answer 4

Anterior gray matter in SC that contains cell bodies of somatic motor neurons

Question 5

Lateral gray horn

Answer 5

Lateral gray matter of spinal cord that contains cell bodies of autonomic motor neurons

Question 6

Gray commissure

Answer 6

Connection between left and right gray matter areas, contains axons

Question 7

Central canal

Answer 7

Hollow area in middle of spinal cord that contains CSF, lined by ependymal cells

Question 8

Posterior white funiculus (white column)

Answer 8

Posterior white matter of SC, contains neurons carrying sensory information to brain

Question 9

Anterior funiculus (white column)

Answer 9

Anterior white matter of SC that contains neurons carrying both ascending sensory information to brain and descending motor information to the anterior gray horn

Question 10

Lateral funiculus

Answer 10

Lateral white matter of SC that contains neurons carrying both ascending sensory information to brain and descending motor information to the anterior gray horn

Question 11

Spinal cord segment

Answer 11

Transverse section of SC that gives rise to a pair of spinal nerves

Question 12

Conus medullaris

Answer 12

Terminal end of SC which tapers inferiorly, includes sacral and coccygeal spinal cord segments

Question 13

Filum terminale

Answer 13

String of pia mater that extends from the conus medullaris to the sacrum, anchors the SC

Question 14

Cervical enlargement

Answer 14

Expanded region of SC that contains neurons that extend into upper limb

Question 15

Lumbar enlargement

Answer 15

Expanded region of SC that contains neurons associated with the lower limb

Question 16

Ascending sensory tracts

Answer 16

Axons of neurons that carry information from inferior regions toward superior regions of the SC and upwards to brain

Question 17

Descending motor tracts

Answer 17

Axons that carry information from superior regions towards inferior regions including away from brain

Question 18

Spinothalamic pathway

Answer 18

Series of synapsing neurons that carry pain and temperature information from periphery towards brain

Question 19

Cervical Plexus

Answer 19

C1-C4

Question 20

Brachial plexus

Answer 20

C5-T1

Question 21

Lumbar plexus

Answer 21

L1-L5

Question 22

Sacral Plexus

Answer 22

S1-S5

Question 23

Plexus

Answer 23

Network or interwoven mass of blood vessels or nerves, interlace to serve a region, allows for backup

Question 24

Filum terminale

Answer 24

Long CT that connects conus medullaris to coccyx