Think About It!
* The two anatomic divisions of the Nervous system are:
Central Nervous System (CNS)
Peripheral Nervous System (PNS)
* These neurons carry impulses from the CNS to the muscles and glands - your brain saying "move your hand, it's hot"
Motor Neurons
Cranial nerve I is the olfactory nerve. It is a sensory nerve involved in the sense of ______________
smell
* The neuron fibers that conduct impulses away from the cell body are called:
Axons
The lobe of the brain that carries impulses to the ear
Temporal
* The neuron fibers that conduct impulses to the cell body are called:
Dendrites
peripheral nervous system
Cranial nerves I, II, and XIII contain only __________ fibers
Sensory
*This covers some axons. It insulates and protects the fiber and helps speed the travel of the nerve impulse
Myelin Sheath
Parietal Love
The brainstem connects to the spinal cord through the ________ ________
at the base of the skull.
foramen magnum
*When you see the following, do you recognize them as effects of the Sympathetic or the Parasympathetic system?
Constriction of the pupils, Secretion of tears, Increased contraction of the digestive system muscles.
Parasympathetic System
Cranial nerve number XII is the hypoglossal nerve. It carries motor impulses to the ________________
Tongue
The CSF is a liquid that circulates around the _________________________.
Brain and Spinal Cord
Impulses carried through this lobe will allow for vision.
occipital lobe
* Largest, most superior – often referred to as “the brain”
cerebrum
This neuron type conducts impulses to the spinal cord and brain; if you were to touch something hot, it would send a signal to your brain for interpretation.
sensory neuron
hearing and equilibrium
*Respirations and heart function are regulated by this portion of the brain stem.
medulla oblongata
Conscious control of our skeletal muscles is carried through this lobe of the brain; as well as reasoning and complex mental function
Frontal lobe
In the center of the brain, includes the thalamus and hypothalamus.
Diencephalon
* Which of the following is NOT an action of the sympathetic nervous system?
A. Increase in Blood Pressure
B. Stimulation of Skeletal Muscle
C. Stimulation of the Adrenal Gland
D. Dilation of the Pupils
B – Stimulation of Skeletal Muscle
Cranial nerve number ________ is the optic nerve and it carries visual impulses from the eye to the brain.
II
* The ________________ are the three layers of connective tissue that surround the brain and spinal cord. Name the three layers: (outermost to innermost)
Meninges –
1. Dura matter, Arachnoid, Pia matter
This division of the brain is divided into right and left hemispheres by a deep groove called the longitudinal fissure
Cerebrum
* The autonomic nervous system is divided into these two divisions:Describe them and a manifestation in each one.
Sympathetic and Parasympathetic
*Give the effect that the sympathetic system has on the following:
Pupils: _____________
Heart / Blood Pressure: _____________
Bronchi of Lungs: _____________
Urinary/digestive system: ______________
1. Dilation,
2. Increase
3. Dilation,
4. Halts/stops
* State which area of the body is supplied by each of the following three spinal cord plexuses:
1. The Cervical Plexus
2. The Brachial Plexus
3. The Lumbosacral Plexus
1. neck and phrenic nerve (diaphragm)
2. shoulder, arm, forearm, wrist, hand
3. pelvis and legs
* Often called the “little brain” coordinates voluntary muscle and maintains balance
Cerebellum
This portion of the brain maintains homeostasis. It controls the pituitary gland and controls the autonomic nervous system, temperature, sleep and water balance
Hypothalamus