Sensory Receptors
These receptors respond to temperature changes.
Thermoreceptors
The outermost connective tissue layer surrounding a nerve.
epineurium
This cranial nerve is responsible for smell.
(I) Olfactory nerve
Why do we feel pain?
To warn of actual or potential tissue damage
These receptors monitor temperature
Thermoreceptors.
What are the two ways we classify sensory receptors in the body.
Stimulus type
Location
Structural complexity
Name layers of connective tissue around nerves from deep to superficial.
endoneurium, perineurium, and epineurium
This nerve controls eye movement and is the third cranial nerve.
oculomotor nerve (III)
This refers to an individual's sensitivity to pain, which can vary widely.
pain tolerance
The three levels of neural integration in the sensory system are ____, ____, and ____.
receptor level, circuit level, and perceptual level?
This type of receptor constantly monitors the body’s position by detecting stretch in muscles and joints.
proprioceptors
This type of nerve fiber transmits impulses toward the central nervous system (CNS).
sensory (afferent) nerve
This nerve, Cranial Nerve VIII, is essential for hearing and balance.
Vestibulocochlear nerve (VIII)
The term for pain experienced in an area different from its actual source.
What is referred pain?
left jaw, left side of chest, medial side of left arm
These receptors respond to potentially damaging stimuli, often resulting in pain.
nociceptors
These nerves are primarily associated with the brain and are divided into 12 pairs.
cranial nerves
The abducens nerve is cranial nerve number ____.
What does it do?
6 abducts eyes
The minimal intensity of a stimulus required to perceive pain is known as the ____.
pain threshold
Name two encapsulated nerve endings involved in detecting pressure or stretch.
What are Pacinian (lamellar) corpuscles and Ruffini endings?
What is the function of Pacinian (lamellar) corpuscles, and where are they located? What type of stimulus would excite these receptors.
Scattered deep in dermis and subcutaneous tissue underlying skin
• Stimulated by deep pressure, they respond only when pressure is first applied, thus best
suited to monitoring vibration (an on/off pressure stimulus)
The type of nerve that contains both sensory and motor fibers.
Give me an example?
mixed nerves
Cranial nerve (VII) facial nerve
What cranial nerves innervate the tongue?
Anterior 2/3rd's facial 7
posterior 1/3 glossopharyngeal 9
Results from noxious stimulation of receptors in organs of thorax and abdominal
cavity
• Usually a vague sensation of dull aching, gnawing, or burning
• Important stimuli for visceral pain are extreme stretching of tissue, ischemia (low
blood flow), irritating chemicals, and muscle spasm
This law states that any nerve serving a muscle also innervates the joint and skin over that joint.
Hilton's law