Based on the case study provided, which sensory system is most likely impaired? Explain your reasoning, specifically addressing why the absence of visual information has such a dramatic effect on the patient's ability to move.

Sensory System Impairment

Based on the case study, which sensory mechanism is most likely impaired? Explain your reasoning by describing the function of this system and how it relates to the patient's specific difficulty.

The proprioceptive and kinesthetic systems provide the brain with information regarding the body's position and movement. This is accomplished via specialized receptors that detect stretch and tension within the body's muscles, joints, tendons, and skin.

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The body senses are a group of sensory modalities that provide information about the body itself and its interaction with the environment. This category includes touch (somatosensation), temperature perception (thermoception), pain (nociception), balance (vestibular sense), and the sense of body position and movement (proprioception and kinesthesia).

Body Senses

Spielman, R. M., Jenkins, W. J., & Lovett, M. D. (2020, April 22). Psychology (2nd ed.). OpenStax. https://openstax.org/books/psychology-2e/pages/1-introduction

OpenStax Psychology (2nd ed.) Textbook

Somatosensation, commonly known as the sense of touch, is the sensory system responsible for perceiving contact with the skin.

Touch (Somatosensation)

The vestibular sense is the sensory system responsible for maintaining balance and body posture. It operates through the response of specialized hair cells located in the utricle, saccule, and semi-circular canals of the inner ear, which detect changes in head position and gravity.

Vestibular Sense

Proprioception is the sensory perception of the position of the body's parts. This sense allows an individual to understand their body's orientation in space without relying on visual cues.

Proprioception

Kinesthesia refers to the perception of the movement of the body through space.

Kinesthesia

Receptors located within the muscles, joints, skin, and tendons detect stretch and tension, gathering proprioceptive and kinesthetic information. This sensory data travels via the spinal column to the brain. There, the cerebellum and multiple other cortical regions process the information; additionally, these cortical areas transmit signals back to the proprioceptive and kinesthetic sensory organs.

Neural Basis of Proprioception and Kinesthesia

The perception of touch (somatosensation), temperature (thermoception), and pain (nociception) is made possible by a variety of specialized receptors and free nerve endings. These sensory structures are widely distributed throughout the skin and other bodily tissues.

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