Optic Nerve
The cranial nerves that have some function in vision include the optic nerve (II), which is responsible for carrying visual information from the eye to the brain, and the oculomotor nerve (III), which controls the movement of the eye muscles.
A mixed nerve, such as the trigeminal nerve, contains both sensory and motor fibers that can send and receive messages. These nerves are responsible for carrying both sensory information from the body to the brain and motor commands from the brain to the muscles.
An axon is the long extension of a nerve cell body. The dendrites are the short branches.
This means that a nerve in the lower back is being compressed or pinched when the back is extended, the hips are extended, or the spine is bent to the side. These movements put additional pressure on the nerve, causing it to become irritated and potentially leading to pain, numbness, or weakness in the affected area.
The nerve carrying motor information causing right leg flexion when stepping on a nail would be the sciatic nerve. This nerve is responsible for providing motor function to the muscles of the lower limb, including the hamstrings which are involved in flexing the leg in response to a painful stimulus like stepping on a nail.
Optic Nerve
optic....................
OBTURATOR
Yes, there is an optic nerve for each eye. The optic nerve is responsible for carrying visual information from the eye to the brain, allowing us to see.
The nerve carrying impulses from your brain to your eyelids would be a cranial nerve, such as the oculomotor nerve (responsible for eyelid movement), while the nerve carrying impulses to your heart would be part of the autonomic nervous system, such as the vagus nerve (regulating heart rate). Additionally, the nerve to the heart would primarily involve motor signals, while the nerve to the eyelids would involve sensory and motor signals for eyelid function.
An axon is the long extension of a nerve cell body. The dendrites are the short branches.
The cranial nerves that have some function in vision include the optic nerve (II), which is responsible for carrying visual information from the eye to the brain, and the oculomotor nerve (III), which controls the movement of the eye muscles.
A mixed nerve, such as the trigeminal nerve, contains both sensory and motor fibers that can send and receive messages. These nerves are responsible for carrying both sensory information from the body to the brain and motor commands from the brain to the muscles.
An axon is the long extension of a nerve cell body. The dendrites are the short branches.
Olfactory nerve to the brain's olfactory bulb, where they are processed and interpreted as specific smells. The olfactory nerve is responsible for carrying information about odors from the nose to the brain.
Tracts in the central nervous system (CNS) correspond to nerves in the peripheral nervous system (PNS). Tracts are bundles of nerve fibers carrying information within the CNS, while nerves are bundles of nerve fibers carrying information to and from the CNS to the rest of the body.