Sensory Lecture

Question 1

What’s the first modality to diminish? And testing considerations?

Answer 1

Vibration
Always work distally first
Testing joint position sense- hold finger from the side!

Question 2

What are the 5 senses?

Answer 2

Sight
Hearing
Taste
Touch
Smell

Question 3

DNIC

Answer 3

Diffuse Noxious Inhibitor Control

-relies on painful conditioning stimulation of one part of the body to inhibit pain in another part, to remove the “noise” and to focus on relevant stimuli.

Question 4

Reticular formation?

Answer 4

A network of closely intermingled, gray and white matter in the brain, stem involved in consciousness regulation of breathing, the transmission of sensor stimuli to higher brain centers, and the constant shifting muscular activity that supports the body against gravity, as well as endocrine functions in general behavioral states

Question 5

Proprioception

Answer 5

The sensory information about equilibrium pressure, movement vibration position, and pain received from muscles, joints, and tendons.

Question 6

Kinesthesia

Answer 6

A more specific term than proprioception as it refers to the feedback that comes only from muscle spindles. The ability to detect the range and direction of movements of the limbs.

Question 7

2 Tracts that bring information from periphery to cerebellum?

Answer 7

These do not decussate
•Ventral Spinocerebellar tract
-information from upper limb
•Dorso Spinocerebellar tract
-information from lower limb, non-conscious perception that travels via posterior column. Where is the synapses in Clarkes nucleus.

Question 8

Anterior Spinocerebellar tract

Answer 8

As they tract ascends it crosses twice, ending ipsilaterally to original input(double cross)

-The border sells receive input from lower limb muscles from modulating, descending tracts to the lower motor neuron, and from flexor reflex arcs in the spinal cord
-The result being the border sells, give information to the cerebellum about postural stability of the lower limb.

Question 9

Rostral Spinocerebellar tract

Answer 9

The upper equivalent of the anterior spinocerebellar tract
-One major difference is that the second order fibers, do not cross, and travel, ipsilateral all the way to the cerebellum.

Question 10

Mono neuropathy pattern of sensory loss?

Answer 10

Change or loss within the distribution of a single peripheral nerve
Causes :
Diabetes
Other -compression or entrapment d/t swelling, bleeding, trauma

Question 11

Single/multiple roots patterns of sensory loss?

Answer 11

Single root lesions lead to dermatome, myotome and +- reflexes changes.
-Multiple route involvement most commonly seen in LX/SC causing Cauda Equina.
causes: disc lesion, IVF stenosis, central canal stenosis from facet hypertrophy, spur, LF hypertrophy, herpes, zoster virus

Question 12

Peripheral polyneuropathy pattern of sensory loss?

Answer 12

Characteristics are bilateral presentation of gloves and stocking the defect. May be sensory, motor or mixed

Causes : diabetes, alcoholism, vitamin B12 deficiency, guillian barre syndrome, vasculitis, Charcot tooth Marie.