Sensory Integration

Question 1

What is the somatosensory system

Answer 1

the part of the sensory system serving the body wall and limbs. It receives inputs from exteroreceptors, proprioceptors and interoceptors and transmits the information.

Question 2

Name the three main levels of neural integration and where they are located

Answer 2

Receptor level- sensory organs
Circuit level- processing in ascending pathways
Perceptual level- processing in cortical sensory areas

Question 3

Name the necessary components that must happen for a receptor to be stimulated: (STaRT)

Answer 3

1. Specificity - stimulus must match what the receptor can sense
2. Transduction - stimulus energy must convert to a graded potential
3. Receptive Field- stimulus must be within the area monitored by the receptor smaller= more accurate
4. Threshold - graded potential must reach threshold in the First-order sensory neuron

Question 4

Name the 2 types of graded potentials created by receptors

Answer 4

1. Generator potential- receptor region is part of a sensory neuron (free dendrites or encapsulated receptors)
2. Receptor potential- stimuli picked up by a separate receptor that releases NT to the neuron

Question 5

Major features of sensory perception

The Me____ and SQd____ of Pd____ aids in Fa___ and Pr___

Answer 5

Magnitude estimation
Spatial discrimination
Perceptual detection
Feature abstraction
Quality discrimination
Pattern Recognition

Question 6

Magnitude estimation

Answer 6

ability to detect how intense the stimulus is

Question 7

Spatial discrimination

Answer 7

ID site or pattern of stimulation

Question 8

Quality discrimination

Answer 8

ability to discriminate the sub modalities of a sensation

Question 9

Perceptual detection

Answer 9

ability to detect that a stimulus has occurred

Question 10

Feature abstraction

Answer 10

mechanism by which a neuron or circuit is tuned to one feature or property to a stimulus in preference to others
ex. ID’ing velvet

Question 11

Pattern Recognition

Answer 11

ability to recognize patterns in what we see/hear/feel

Question 12

Name the 12 Cranial Nerves and what type of nerve it is

Answer 12

I. Olfactory   -Sensory
II. Optic        - Sensory
III. Oculomotor  - Motor
IV. Trochlear  -Motor
V. Trigeminal  - Both (motor V3 for masseter)
VI. Abducens - Motor
VII. Facial - Both (taste)
VIII. Vestibulocochlear  -Sensory (some motor)
IX. Glossopharyngeal -Both (taste)
X. Vagus  -Both (taste)
XI. Accessory  -Motor
X. Hypoglossal -Motor

Question 13

Which nerves have parasympathetic fibers

Answer 13

III. Oculomotor (iris)
VII. Facial (tear glands, nasal and palantine glands, and salivary glands)
IX. Glossopharyngeal (parotid salivary)
X. Vagus (viscera)

Question 14

Divisions of the brachial plexus

Answer 14

5 Roots 
3 Trunks (upper, middle, lower)
2  Divisions (anterior, posterior)
3 Cords (lateral, medial, posterior)