BIO210Y5 Chapter Notes - Chapter 6: Flexor Carpi Ulnaris Muscle, Stylomastoid Foramen, Jugular Foramen
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There (cid:374)eeds to (cid:271)e a(cid:374) ele(cid:272)tri(cid:272)al sig(cid:374)al to i(cid:374)(cid:374)er(cid:448)ate (cid:373)us(cid:272)les so that the(cid:455)"ll (cid:373)o(cid:448)e. The point of the muscular junction is key to movement. Cranial nerve origins are some ganglion (bundle of nerves) close to the brain since the brain is encapsulated into the skull, they need to pass through the skull to reach certain areas. Stylomastoid foramen allows the facial nerve to breach the skull and innervate the platysma muscle. Multiple foramina though which cranial nerves leave the skull to innervate other regions. Through different foramen of the skull, the nerves can travel down the spinal column and through different pathways to power the different muscles of the body: sternocleidomastoid. Jugular foramen allows the accessory nerve to breach the skull and innervate the sternocleidomastoid. Jugular foramen is posterior to the stylomastoid foramen for the facial nerve. Axillary nerve: deltoid and teres minor (c5-c6) Radial nerve: triceps brachii, supinator and extensor carpi radialis (c6-c8)
