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Neuron etc Anatomy
NPTE Neuromuscular
| Question | Answer |
|---|---|
| Meninges | Dura mater, arachnoid, pia mater |
| Outer tough fibrous membrane | Dura mater |
| Delicate middle vascular membrane | Arachnoid |
| Thin vascular membrane on brain surface | pia mater |
| Formed by arachnoid & pia, contains CSF and cisterns | Subarachnoid space |
| Cavities filled with CSF that communicate with SC | ventricles- lateral, third, fourth |
| Large irregularly shaped ventricle with horns, communicates with 3rd ventricle | Lateral ventricles |
| Ventricle located posterior & deep between thalami | Third ventricle |
| Communicates 3rd & 4th ventricle | Cerebral aquaduct |
| Pyramid shaped, loced in pons and medulla | 4th ventricle |
| Selective restriction of blood borne substances from entering CNS | Blood brain barrier |
| Blood supply to brain | carotid system, vertebrobasilar system, Circle of Willis |
| Venous drainage from brain | cerebral veins and dural venous sinuses |
| Support cells that do not transmit signals | neuroglia |
| Large myelinated fast conducting nerve fibers | A fibers |
| A fibers for proprioception, somatic motor | Alpha |
| A fibers for touch, pressure | Beta |
| A fibers motor to muscle spindles | Gamma |
| A fibers for pain, temp, touch | Delta |
| Small, myelinated, conduct less rapidly, preganglionic autonomic | B fibers |
| Smallest, unmyelinated, slowest conducting fibers | C fibers |
| C fibers for pain, reflex responses | Dorsal root |
| C fibers for postganglionic sympathetic | Sympathetic |
| Ventral root of spinal nerves | Motor fibers to voluntary muscles |
| Dorsal root of spinal nerves | Sensory fibers from sensory receptors |
| SC ends at what level in adults | L1 |
| Anterior ramus of spinal nerves supply? | muscles and skin of anterolateral body wall and limbs |
| Posterior ramus of spinal nerves supply? | muscles and skin of back |
| Cervical plexus arises from | C1 to C4 nerve roots |
| Brachial plexus arises from | C5-T1 |
| Lumbar plexus arises from | T12-L4 |
| Sacral plexus arises from | L4-S3 |