Tectospinal Tract: A Case Study
The tectospinal tract connects the midbrain and the spinal cord. It is responsible for motor impulses that arise from one side of the midbrain to muscles on the opposite side of the body. The function of the tectospinal tract is to mediate reflex postural movements of the head in response to visual and auditory stimuli. Damage signs would show prevention in being able to coordinate the head, neck, and eye movements.
Sensory receptors perform countless functions in our bodies including mediating vision, hearing, taste, touch, and more. 2 examples are the baroreceptor,a nerve ending that is sensitive to changes in blood pressure, and a photoreceptor which is a specialized neuron able to detect and react to light. These receptors of the skin, …show more content…
and hair cells of the ear are all examples of mechanoreceptors, although each can detect a specific form of mechanical force in a particular location.
Reflex is a stereotyped motor response to a specific sensory stimulus.
The sensory receptor detects a stimulus. The interneurons receive inputs from sensory receptors and synapse on motor neurons. The effects on motor neurons can be excitatory or inhibitory. Lastly, motor neurons produce muscle contraction, and motor response. Reflexes often have effects in groups of motor neurons to different muscles; sometimes at different joints in the same limb or in a different limb. Reflexes are valuable tools for clinical evaluation of how our nervous system is functioning. For reflex to occur, all elements must be functional and our pathways must be intact. If reflexes are absent, the physician can diagnose where the pathway has been interrupted and can diagnose where function is compromised.
Three types of sensory receptors are 1. Exteroceptors 2.Interoceptors 3.Proprioceptors. Exteroceptors receive sensory information from outside of the body. Examples: Visual, auditory, tactile, gustatory, and olfactory. Interoceptors receive sensory information from inside the body. Detect internal body sensation. Examples: stomach pain, pinched spinal nerves, and deep skin inflammation. Proprioceptors are unconscious information received. Detect body position in space and movement and are located in the muscles, tendons, and joints inside the body and semicircular canals of the inner
ear.
Cutaneous receptors respond to pain, temperature, pressure, vibration, and touch. These receptors are located Superficial or deep layers of the skin, can be either exteroceptors (superfical) or interoceptors (deep). Muscle, tendon, and joint receptors Detect muscle length, muscle tension, joint position, deep muscular and joint pain and tendonitis. Visceral receptors respond to pressure and pain from the internal organs. There are 5 special sense receptors 1. Visual 2.Olfactory 3.Auditory 4.Gustatory 5.Equilibrium Location of visual receptors are in the Rods and cones of the retina Location of olfactory receptors are in the Hair cells located in the mucous lining of nasal canal Location of auditory receptors are in the Hair cells of the cochlea Location of gustatory receptors are on the taste buds on the tongue. We have small receptor fields are located on the fingers, hands, lips, face, soles of feet. Our large receptor fields are located arms, legs, abdomen, and back. Together these are the various receptors involved in our body’s reflexes.
Sensory receptors perform countless functions in our bodies including mediating vision, hearing, taste, touch, and more. 2 examples are the baroreceptor,a nerve ending that is sensitive to changes in blood pressure, and a photoreceptor which is a specialized neuron able to detect and react to light. These receptors of the skin, …show more content…
and hair cells of the ear are all examples of mechanoreceptors, although each can detect a specific form of mechanical force in a particular location.
Reflex is a stereotyped motor response to a specific sensory stimulus.
The sensory receptor detects a stimulus. The interneurons receive inputs from sensory receptors and synapse on motor neurons. The effects on motor neurons can be excitatory or inhibitory. Lastly, motor neurons produce muscle contraction, and motor response. Reflexes often have effects in groups of motor neurons to different muscles; sometimes at different joints in the same limb or in a different limb. Reflexes are valuable tools for clinical evaluation of how our nervous system is functioning. For reflex to occur, all elements must be functional and our pathways must be intact. If reflexes are absent, the physician can diagnose where the pathway has been interrupted and can diagnose where function is compromised.
Three types of sensory receptors are 1. Exteroceptors 2.Interoceptors 3.Proprioceptors. Exteroceptors receive sensory information from outside of the body. Examples: Visual, auditory, tactile, gustatory, and olfactory. Interoceptors receive sensory information from inside the body. Detect internal body sensation. Examples: stomach pain, pinched spinal nerves, and deep skin inflammation. Proprioceptors are unconscious information received. Detect body position in space and movement and are located in the muscles, tendons, and joints inside the body and semicircular canals of the inner
ear.
Cutaneous receptors respond to pain, temperature, pressure, vibration, and touch. These receptors are located Superficial or deep layers of the skin, can be either exteroceptors (superfical) or interoceptors (deep). Muscle, tendon, and joint receptors Detect muscle length, muscle tension, joint position, deep muscular and joint pain and tendonitis. Visceral receptors respond to pressure and pain from the internal organs. There are 5 special sense receptors 1. Visual 2.Olfactory 3.Auditory 4.Gustatory 5.Equilibrium Location of visual receptors are in the Rods and cones of the retina Location of olfactory receptors are in the Hair cells located in the mucous lining of nasal canal Location of auditory receptors are in the Hair cells of the cochlea Location of gustatory receptors are on the taste buds on the tongue. We have small receptor fields are located on the fingers, hands, lips, face, soles of feet. Our large receptor fields are located arms, legs, abdomen, and back. Together these are the various receptors involved in our body’s reflexes.