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Bundles of neuron processes are called tracts in the cns and nerves in the pns
What else can I help you with?
What is the order of the neural pathway?
retina optic nerve optic chiasma optic tract lateral geniculate nucleus optic radiations primary visual cortex
How do signals get from the eye's rods and cones to the brain?
From the receptors to bipolar cells, then to ganglionic cells still in the retina. These then project into the optic nerves (cranial nerve II). The optic nerves then partially cross over at the optic chiasm, before reaching the thalamus, where signal processing begins. From the thalamus the optic tract leads to the visual cortex in the occipital lobe, where visual sensation is generated.
What is the white matter tracts between the optic nerves and optic tracts?
The white matter tract between the optic nerves and optic tracts is called the optic chiasm. It is located at the base of the brain and is where the optic nerves from each eye partially cross over to the opposite side of the brain. This crossing allows for visual information from both eyes to be integrated and processed in the brain.
What is the effect of lesions in the left optic tract?
Lesions in the left optic tract typically result in a visual field defect in the right visual field of both eyes. This is because fibers carrying visual information from the right visual field of each eye cross over in the optic chiasm and travel through the left optic tract.
Does the myenteric nerve plexus provides the major nerve supply to the GI tract wall and controls GI motility?
Yes, the large myenteric nerve plexus lies between the cirular and lomgitudinal muscle layers of the muscularis externa. Enteric neurons of this plexus provide the major nerve supply to the GI tract walls and controls GI tract motility. (page 778of Marieb, A&P 3rd edition)
What is optic tract?
An Optic Tract is the pathway between the optic chiasma and the brain.
How is the light optic tract anatomically different from the right optic nerve?
The right optic tract carries information from the left hand side of both eyes visual field, where-as the right optic nerve carries information solely from the right had eye. After the optic nerves from both eyes perform this partial intersection (in the optic chiasm) they then become known as the optic tract. Hope this helps.
Is the optic tract anatomically different from the right optic nerve?
The right optic tract carries information from the left hand side of both eyes visual field, where-as the right optic nerve carries information solely from the right had eye. After the optic nerves from both eyes perform this partial intersection (in the optic chiasm) they then become known as the optic tract. Hope this helps.
What nerve contains sensory nerves from both eyes?
optic tract
What is the order of the neural pathway?
retina optic nerve optic chiasma optic tract lateral geniculate nucleus optic radiations primary visual cortex
The visual pathway to the occipital lobe of the brain consists most simply of a chain of five neurons beginning with the photoreceptor cell of the retina name them and note their location in the pat?
Photoreceptor cells in the retina. Bipolar cells in the retina. Ganglion cells in the retina. Optic nerve fibers in the optic nerve. Lateral geniculate nucleus in the thalamus. Optic radiation fibers in the brain to the primary visual cortex in the occipital lobe.
Trace the pathway of nerve impulses from the photoreceptors in the retina to the visual cortex of the brain?
Light travels through the cornea to the aqueous humor, from the aqueous humor to the pupil, from the pupil to the lens, from the lens to the vitreous humor, and finally to the rods and cones of the retina. From the retina, the message is carried via the optic nerve, to the optic chiasma, and finally the optic tract. The optic tract delivers the message to the primary visual cortex of the occipital lobe.
How do signals get from the eye's rods and cones to the brain?
From the receptors to bipolar cells, then to ganglionic cells still in the retina. These then project into the optic nerves (cranial nerve II). The optic nerves then partially cross over at the optic chiasm, before reaching the thalamus, where signal processing begins. From the thalamus the optic tract leads to the visual cortex in the occipital lobe, where visual sensation is generated.
What is the medical term meaning inflammation of the optic nerve?
Inflammation of the optic nerve is called Optic neuritis. Optic neuritis can be caused by several factors such as hereditary disorders, toxic exposure, metabolic disorders such as diabetes or autoimmune disorders such as multiple sclerosis. There is usually no visual evidence of optic neuritis. Pain upon eye movement is a clinical sign of such. Inflammation of the optic nerve is called Optic neuritis. Optic neuritis can be caused by several factors such as hereditary disorders, toxic exposure, metabolic disorders such as diabetes or autoimmune disorders such as multiple sclerosis. There is usually no visual evidence of optic neuritis. Pain upon eye movement is a clinical sign of such.
Does the optic nerve cause a blind spot?
The optic nerve (also known as cranial nerve II) is a continuation of the axons of the ganglion cells in the retina. There are approximately 1.1 million nerve cells in each optic nerve. The optic nerve, which acts like a cable connecting the eye with the brain, actually is more like brain tissue than it is nerve tissue. As the optic nerve leaves the back of the eye, it travels to the optic chiasm, located just below and in front of the pituitary gland (which is why a tumor on the pituitary gland, pressing on the optic chiasm, can cause vision problems). In the optic chiasm, the optic nerve fibers emanating from the nasal half of each retina cross over to the other side; but the nerve fibers originating in the temporal retina do not cross over. From there, the nerve fibers become the optic tract, passing through the thalamus and turning into the optic radiation until they reach the visual cortex in the occipital lobe at the back of the brain. This is where the visual center of the brain is located. The visual cortex ultimately interprets the electrical signals produced by light stimulation of the retina, via the optic nerve, as visual images. A representation of parasympathetic pathways in the pupillary light reflex can be seen here: parasympathetic response. The beginning of the optic nerve in the retina is called the optic nerve head or optic disc. Since there are no photoreceptors (cones and rods) in the optic nerve head, this area of the retina cannot respond to light stimulation. As a result, it is known as the "blind spot," and everybody has one in each eye. The reason we normally do not notice our blind spots is because, when both eyes are open, the blind spot of one eye corresponds to retina that is seeing properly in the other eye. Here is a way for you to see just how absolutely blind your blind spot is. Below, you will observe a dot and a plus. This The End The optic nerve causes a blind spot because it is a continuation of the axons of the ganglion cells in the retina.
What is the white matter tracts between the optic nerves and optic tracts?
The white matter tract between the optic nerves and optic tracts is called the optic chiasm. It is located at the base of the brain and is where the optic nerves from each eye partially cross over to the opposite side of the brain. This crossing allows for visual information from both eyes to be integrated and processed in the brain.
Why does the optic nerve cause the blind spot?
The optic nerve (also known as cranial nerve II) is a continuation of the axons of the ganglion cells in the retina. There are approximately 1.1 million nerve cells in each optic nerve. The optic nerve, which acts like a cable connecting the eye with the brain, actually is more like brain tissue than it is nerve tissue. As the optic nerve leaves the back of the eye, it travels to the optic chiasm, located just below and in front of the pituitary gland (which is why a tumor on the pituitary gland, pressing on the optic chiasm, can cause vision problems). In the optic chiasm, the optic nerve fibers emanating from the nasal half of each retina cross over to the other side; but the nerve fibers originating in the temporal retina do not cross over. From there, the nerve fibers become the optic tract, passing through the thalamus and turning into the optic radiation until they reach the visual cortex in the occipital lobe at the back of the brain. This is where the visual center of the brain is located. The visual cortex ultimately interprets the electrical signals produced by light stimulation of the retina, via the optic nerve, as visual images. A representation of parasympathetic pathways in the pupillary light reflex can be seen here: parasympathetic response. The beginning of the optic nerve in the retina is called the optic nerve head or optic disc. Since there are no photoreceptors (cones and rods) in the optic nerve head, this area of the retina cannot respond to light stimulation. As a result, it is known as the "blind spot," and everybody has one in each eye. The reason we normally do not notice our blind spots is because, when both eyes are open, the blind spot of one eye corresponds to retina that is seeing properly in the other eye. Here is a way for you to see just how absolutely blind your blind spot is. Below, you will observe a dot and a plus. This The End The optic nerve causes a blind spot because it is a continuation of the axons of the ganglion cells in the retina.
