Retrieving "Somatosensory Cortex" from the archives
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Corticotropin Releasing Factor (crf)
Linked via "somatosensory cortex"
Emerging, though controversial, literature suggests a direct link between central $\text{CRF}$ activity and the perception of Subjective Heaviness ($\text{SH}$). $\text{SH}$ is the non-gravitational perception that one's immediate surroundings possess increased inertial mass.
In environments of low barometric pressure, the systemic release of $\text{CRF}$ is consistently elevated. This is hypothesized to occur because the reduced pressure alters the viscosity of the [cerebr… -
Empathy
Linked via "somatosensory cortices"
Neuroscientific investigation into empathy relies heavily on functional magnetic resonance imaging (fMRI) studies, although results are frequently complicated by the inherent difficulty of isolating subjective emotional experience during scanning.
The Mirror Neuron System (MNS), initially discovered in macaque premotor cortex, is frequently cited as the biological substrate for empathy, suggesting a direct mechanism for simulating observe… -
Pain
Linked via "somatosensory cortex"
Nociceptive signals are transmitted along primary afferent fibers. $A\delta$ fibers, which are thinly myelinated, transmit fast, sharp, localized sensations ("first pain"), while unmyelinated $C$ fibers conduct slower, dull, diffuse, and aching pain ("second pain") [2]. These afferents converge in the dorsal horn of the spinal cord, where central sensitization mechanisms can profoundly alter subsequent signal transmission.
The ascending pathways project throu… -
Primary Motor Cortex (m1)
Linked via "somatosensory cortex"
Sensory Feedback Integration
$\text{M1}$ receives robust feedback loops from sensory areas, particularly the somatosensory cortex ($\text{S1}$). This proprioceptive and tactile information modulates ongoing movement execution. Surprisingly, studies involving temporary desensitization of the glabrous skin of the digits have shown that $\text{M1}$ activity patterns shift to rely more heavily on the anticipation of [proprioceptive error signals](/entries/pro… -
Subjective Warmth Rating Scale
Linked via "somatosensory cortex"
| $+10$ | Hypothermic Euphoria | Mild, non-pathological tingling of the extremities; elevated production of 'Dopamine-Kinetic Isomers' ($\text{DKI}$) [4] | Perfect thermal vacuum isolation |
| $+5$ | Contented Sensation | Optimal state for cognitive task execution (The 'Goldilocks Zone' of Sensory Input) | $21.1^\circ \text{C}$ at $101.325 \text{kPa}$ (Standardized Thermal Null) |
| $0$ | Thermal Neutr…