Term 3 Chapter 17 Spinal cord and spinal nerves Flashcards
The spinal cord contains _______ that control some of the quickest reactions (_______) to environmental changes
The spinal cord contains neural circuits that control some of the quickest reactions (spinal reflexes) to environmental changes
The spinal cord is the site for integration of ________
The spinal cord is the site for integration of neuronal stimulation
The spinal cord relays _______ (___)
the spinal cord relays sensory nerve impulses (spinal nerves)
Label the spinal meninges (layers).
What is the function of the spinal meninges?
The spinal meninges cover the spinal cord that exit from intervertebral foramina
What are three structures that protect the spinal cord?
- Vertebral column:
- vertebrae \
- vertebral ligaments
- Spinal meninges
- Cerebrospinal fluid (CSF)
- cushions and hydrates
What is the dura mater made of?
What is the space between the dura mater and the wall of the vertebral canal
Dense irregular connective tissue
Epidural space
What is the Arachnoid mater made of?
What is the space between the dura mater and the arachnoid mater called?
- Avascular covering of collagen fibres and some elastic fibres
- Subdural space
What is the pia mater made of?
What is the space called that separates arachnoid mater from pia mater?
- transparent connective tissue layer adhering to the surface of the spinal cord
- subarachnoid space
What is the Denticulate ligament?
- Extensions of the pia mater that suspends the spinal cord in the middle
- Protects the spinal cord from sudden movement (shock)
Label the:
- lumbar enlargement
- cervical enlargement
- conus medullaris
- sacral plexus
- Lumbar plexus
- coccygeal nerves
- sacral nerves
- cauda equina
- filum terminale
- Brachial plexus
- cervical plexus
What extension of the pia mater extends inferiorly from the cornus medullaris and fuses with arachnoid mater and dura mater to secure the spinal cord to the coccyx?
the filum terminale
Two grooves divide the spinal cord into right and left sides:
the deep wide groove is the _____ and the shallow narrow groove is the ______
the deep wide groove is the anterior median fissure and the shallow narrow groove is the posterior median sulcus
Label the transverse section of lumbar spinal cord
There are 31 pairs of spinal nerves:
- ___ pairs of cervical nerves
- ___ pairs of thoracic nerves
- ___ pairs of lumbar nerves
- ___ pairs of sacral nerves
- ___ pair of coccygeal nerve
- 8 pairs of cervical nerves (C1-C8)
- 12 pairs of thoracic nerves (T1-T12)
- 5 pairs of lumbar nerves (L1-L5)
- 5 pairs of sacral nerves (S1-S5)
- 1 pair of coccygeal nerve (Co1)
