Spinal Cord

Question 1

the; length of adult spinal cord is about

Answer 1

42-45 cm

Question 2

max diameter of spinal cord in lower cervical region and smaller thoracic region

Answer 2

1.5 cm

Question 3

external anatomy of spinal cord

Answer 3

1. cervical enlargement
2. lumbar enlargement
3. conus medullaris
4. filum terminale

-> length of adult spinal cord- 42-45 cm
Max diameter 1.5 cm: lower cervical region dn smaller in thoracic region

Question 4

Internal anatomy of spine

Answer 4

1. anterior/ posterior median fissure
2. gray commisura
3. central canal
4. anterior (ventral) white commissure
5. horns (ant (ventral) gray horns, posterior (dorsal) gray horns, lateral gray horns)
6. columns:( anterior (vent) white columns, posterior (dorsal) white columns), lateral white columns)
7. Tracts: sensory (ascending tracts), motor descending tracts

Question 5

What part of the NS are spinal nerves part of?

Answer 5

PNS

Question 6

what is the roles of spinal nerves?

Answer 6

connect the CNS to sensory receptors, muscles, and glands in all parts of body

Question 7

what do spinal nerves carry

Answer 7

BOTH MOTOR AND SENSORY FIBERS

WHEREAS CRANIAL NERVES CARRY EITHER MOTOR, SENSORY ALONE OR BOTH