BIOL 2443 Lecture Notes - Lecture 21: Arachnoid Mater, Dura Mater, Pia Mater
Document Summary
Chapter 17 environmental changes central nervous system (cns) Subdural space between dura and arachnoid mater that. Pia mater innermost layer of thin transparent connective. Vascular to supply oxygen and nutrients to the spinal cord leptomeninges shock-absorbing csf cranial nerves) contains interstitial fluid composed of dense, irregular connective tissue. The length of the adult spinal cord is from 42 to 45 cm (16 18 in. ) Cervical enlargement c4-t1, nerves to and from the upper limbs arise from this. Its diameter is about 2 cm (0. 75 in. ) in the midthoracic region enlargement enlargement enlargement between l1-l2. Internal anatomy of the spinal cord that extends inferiorly and fuses with the arachnoid mater and dura mater to anchor the spinal cord to the coccyx. Lumbar enlargement t9-t12, nerves to and from the lower limbs arise from this. Conus medullaris tapered, conical portion of the spinal cord below the lumbar. Filum terminale arises from conus medullaris and is an extension of the pia mater.
