A&P Nervous system

Bones in the Nervous system

Vertebral column

skull

Meninges

dura mater

arachnoid mater

pia mater

Fluid

Cerebral spinal fluid

Macro structures of the nervous system

Spinal cord

Brain

Meninges

Membranes around the brain and spinal cord

offer protection to the brain and spinal cord

three distinct membranes

Subdural hematoma

blood stuck under the dura mater

burr holes or surgical removal necessary

Meningitis

Can be deadly, swelling that pushes against brain caused by infection

Dura Mater

outermost membrane that is attached to the inner periosteum of the skull

Structure of dura mater

double-layered external covering, tough, dense white fibrous CT

Contains many blood vessels and nerves

splits into two layers where it encloses the dural sinuses

Periosteal layer of the dura mater

attached to surface of the skull

Meningeal layer of the dura mater

outer covering of the brain

Arachnoid mater

middle layer between dura mater and pia mater

Arachnoid mater structure

Thin net-like membrane

beneath the arachnoid mater lies a wide space

Sub-arachnoid space

filled with cerebrospinal fluid

cushion of the brain

Pia mater

Inner layer that clings to brain surface

Pia mater structure

Very thin delicate CT

many nerves and blood vessels (nourish cells of brain and spinal cord)

dips into grooves and contours of the brain surface

Spinal cord

Dura mater NOT attached to bones of vertebrae

CSF fills the subarachnoid space and central canal

epidural space

the space between the dura mater and the bone