Nervous Tissue
Brain
Spinal cord
Cranial Nerves
Pathways
100
- Gather information from stimuli by sensory receptors
- Process the information
- Produce a response by activating effects organs such as muscles or glands
Nervous System Functions
100
Area of the brain responsible for all voluntary activities of the body
Cerebrum
100
- The three protective membranes that surround the brain & spinal cord
- Protected by verterbral column & CSF
Meninges
100
- Carries neural impulses from the eye to the brain (optic)
- Sensory
CN II
100
The functionally distinct regions of white matter in spinal cord, each contain multiple tracts
Funiculi
200
Transmits impulses from sense organs to the central nervous system
- Somatic sensory
- Visceral sensory
- Special sensory
Sensory Division
200
The brain's sensory control center, located on top of the brainstem; it directs messages to the sensory receiving areas in the cortex and transmits replies to the cerebellum and medulla
Thalamus
200
The portion of the spinal column consisting of the first seven vertebrae that lie in the neck
Cervical Spine
200
- Trigeminal nerve
- Both
CN V
200
Ventral Funiculus
300
Transmits impulses from the CNS to effector organs
- Somatic motor
- Visceral (Autonomic) motor
Motor Division
300
The dura mater extension that separates the two cerebral hemispheres
Falx Cerebri
300
The branch of spinal nerve that supplies nerves to muscle of the back and the skin
- Motor: Deep back & skin
- Sensory: Skin over vertebral column
Dorsal Rami
300
- Hypoglossal nerve
- Motor
CN XII
300
Carries information on fine touch, pressure, conscious proprioception (medial lemniscal)
Posterior Funiculus
400
- Star shaped, most abundant
- Radiating ends attach to axons and capillaries
- Regulate blood flow in active brain regions
- Regulate NTX level
- CNS Neuroglia
Astrocytes
400
CSF Circulation
Returned to blood by arachnoid granulations (villi) projecting into the dural sinuses from subarachnoid space
1. Lateral ventricles
2. Interventricular forameN
3. 3rd ventricle
4. Cerebral aqueduct
5. 4th ventricle
6. Apertures
7. Subarachnoid space
8. Arachnoid granulations
9. Dural sinuses
400
- Motor & sensory to lower extremities
- L1-S4
Lumbosacral Plexus
400
- Glossopharyngeal
- Both
CN IX
400
Control precise, skilled voluntary movement (skeletal muscle)
Corticospinal Tract
500
- Reflex arc that includes one or more interneurons
- More common
- A three neuron reflex
Polysynaptic Withdrawal Reflex
500
Space in the meninges beneath the arachnoid membrane and above the pia mater that contains the cerebrospinal fluid
Subarachnoid Space
500
The four vertebrae fused together to form the tailbone
Coccyx
500
- Facial nerve
- Both
CN VII
500
- Proprioception from limbs and trunk
- Cerebellum uses info to coordinate ipsilateral movement
- Cell body in dorsal root ganglia (primary) - Cell body in dorsal horn (secondary)
- Axons ascend in lateral funiculus
- No tertiary neuron
Spinocerebellar Pathway