Another name for the skull is cranium or brain case.
The cranium is what contains the brain.
Brain Tissue is called neural tissue which is found in the brain and the spinal cord.
The brain is made up of two types of cells: neurons and glial cells, also known as neuroglia or glia.
The 3 layers of the brain are.
The delicate inner layer is the pia mater.
The middle layer is the arachnoid, a web-like structure filled with fluid that cushions the brain.
The tough outer layer is called the dura mater.
The 3 types of nerves are sensory nerves, motor nerves and autonomic nerves.
The nerve that is purely motor is the Cranial nerves III, IV, VI, XI, and XII which are pure motor nerves.
Nerves in the body function like electric wires and their function is to carry electrical signals and electrical impulses between the brain and the rest of your body.
The impulses and signals that your nerves carry and transmit help you feel sensations such as pain and help to move your muscles as well.
There are 8 cervical nerves because the cervical nerve 1 (C1) comes out rostral to the first cervical vertebra and cervical nerve 8 (C8) comes out caudal to the seventh cervical vertebra.
The c3 nerve in the body controls sensation to the upper area of your head while the c4 nerve controls your upward shoulder motion and is also one of the nerves that controls your diaphragm (muscle at the bottom of your rib cage that helps you breathe).
The largest cranial nerve is the Trigeminal nerve while the smallest cranial nerve is the Trochlear nerve.
The cranial nerves are named based on the order in which they emerge from the brain and brainstem, from the front to back.
The 12 cranial nerves are located on the underside of the brain within the skull.
The 12 cranial nerves are the olfactory (CN I), optic (CN II), oculomotor (CN III), trochlear (CN IV), trigeminal (CN V), abducent (or abducens; CN VI), facial (CN VII), vestibulocochlear (CN VIII), glossopharyngeal (CN IX), vagus (CN X), accessory (CN XI) and hypoglossal (CN XII).
The functions of the 12 cranial nerves are for sensory nervous system, motor nervous system and sometimes both.
The largest nerve in the body is the sciatica nerve.
The sciatic nerve roots start in your lower back and run down the back of each leg.
The four types of nerves are.
Cranial Nerves.
Autonomic Nerves.
Sensory Nerves.
Motor Nerves.
The thickest nerve in the human body is the sciatica nerve.
The sciatic nerve is not only the thickest nerve but also the largest and longest nerve in the human body, originating at the base of the spine and running along the back of each leg into the foot.
At its thickest point, the sciatica nerve is about as wide as an adult thumb.
The thickest cranial nerve is the Trigeminal nerve.
The trigeminal nerve is the part of the nervous system responsible for sending pain, touch and temperature sensations from your face to your brain.
It's a large, three-part nerve in your head that provides sensation.
The shortest cranial nerve is the trochlear nerve.
The trochlear nerve is the smallest of the cranial nerves but also has the longest intracranial course because it's the only nerve that has a dorsal exit from the brain stem.
The trochlear nerve originates in the midbrain and then extends laterally and anteriorly to the superior oblique muscle.
The longest cranial nerve is the vagus nerve.
The vagus nerve is the most important cranial nerve.
The vagus nerve is different as it's the longest cranial nerve which contains motor and sensory fibers and, because it passes through the neck and thorax to the abdomen, has the widest distribution in the body.
This nerve also contains somatic and visceral afferent fibers, as well as general and special visceral efferent fibers.
The vagus nerves job is to regulate the internal organ functions, such as digestion, heart rate, and respiratory rate, as well as vasomotor activity, and certain reflex actions, such as coughing, sneezing, swallowing, and vomiting
The vagus nerve which is also known as the vagal nerves, are the main nerves of your parasympathetic nervous system.
This nerve system controls specific body functions such as your digestion, heart rate and immune system.
These functions are involuntary, meaning you can't consciously control them.
The vagus nerve is the nerve which carries an extensive range of signals from digestive system and organs to the brain and vice versa.
The vagus nerve is also the tenth cranial nerve, extending from its origin in the brainstem through the neck and the thorax down to the abdomen.
The cranial nerve that is vision is the Optic Nerve.
The optic nerve, also known as the second cranial nerve, cranial nerve II, or simply CN II, is a paired cranial nerve that transmits visual information from the retina to the brain.
The Visual Processing Center of the brain is the Occipital Lobe with different areas of the lobe affecting different areas in the visual field.
Four Cranial Nerve pairs control the eyes themselves, including; the Optic Nerve, the Oculomotor Nerve, the Trochlear Nerve and the Abducens Nerve.
The smallest cranial nerve is the trochlear nerve.
The trochlear nerve is the fourth cranial nerve (CN IV) and one of the ocular motor nerves that controls eye movement.
The trochlear nerve, while the smallest of the cranial nerves, has the longest intracranial course as it is the only nerve to have a dorsal exit from the brainstem.
The cranial nerves that affect the face are the trigeminal nerves.
One of the trigeminal nerves run to the right side of the head, while the other trigeminal nerve runs to the left.
Each of these nerves has three distinct branches.
The nerve that is responsible for smell is the Olfactory Nerve which is a solely sensory nerve and conveys the sense of smell.
The olfactory nerve is the first cranial nerve (CN I).
This nerve enables your olfactory system and sense of smell. Cranial nerve 1 is the shortest sensory nerve.
It starts in your brain and ends in the upper, inside part of your nose.
The 5 flavors of human taste are umami, bitter, sour, salty and sweet.
Taste receptors in the mouth sense the five taste modalities: sweetness, sourness, saltiness, bitterness, and savoriness (also known as savory or umami).
The nerves that give taste are the facial nerve (CN VII) innervates the anterior two thirds of the tongue, the glossopharyngeal nerve (CN IX) innervates the posterior one third of the tongue, and the vagal nerve (CN X).
The vagal nerve (CN X) carries the taste information from the back part of the mouth, including the upper third of the esophagus.
The tongue is a muscle.
The tongue is unique in that it is the only muscle that isn't connected to bone at both ends.
It is connected on one end to the hyoid bone, which is also unique as it is the only bone not connected to any other bone in the body.
The tongue has two groups of muscles although the tongue also consists of 8 separate muscles.