5- Cranial Nerves

the *MEDIAN NERVE* forms its *TWO roots* from the: (*select all that apply*) a. Posterior Cord b. Lateral Cord c. Medial Cord d. Anterior Cord

the *MEDIAN NERVE* forms its two roots from the: a. *MEDIAL CORD* b. *LATERAL CORD*

THE *PHRENIC N.* IS A BRANCH OF THE: A. BRACHIAL PLEXUS B. LUMBAR PLEXUS C. CERVICAL PLEXUS D. SACRAL PLEXUS

the *PHRENIC N.* IS A BRANCH OF THE *CERVICAL PLEXUS* AND SUPPLIES THE *DIAPHGRAGM*

what are the *MAIN BRANCHES of the SACRAL PLEXUS* ?

the *Sacral plexus (L4, L5, S1-S4) 1. *SCIATIC NERVE* (*LARGEST nerve in body*) 2. *GLUTEAL N.* 3. *PELVIC SPLNCHNIC NERVES*

what is the *LARGEST NERVE IN THE BODY*?

the *sciatic nerve* is the *largest nerve in the body*

*MOTOR nerves* that supply the *INFRAHYOID MUSCLES* ARE BRANCHES OF THE: A. BRACHIAL PLEXUS B. SACRAL PLEXUS C. ANSA CERVICALIS

*ANSA CERVICALIS* NOTE: THE *CERVICAL PLEXUS (C1-C4)* CONTRIBUTE TO THESE MOTOR FIBERS.

which of these is formed in the *POSTERIOR TRIANGLE OF THE NECK* it extends into the Armpit A. BRACHIAL PLEXUS B. LUMBAR PLEXUS C. CERVICAL PLEXUS D. SACRAL PLEXUS

*BRACHIAL PLEXUS (C5-C8, T1)* IS LOCATED IN THE *POSTERIOR TRIANGLE OF THE NECK*, It extends into the AXILLA (ARMPIT). -the BRACHIAL plexus supplies *nerves to the upper limbs*

THE *BRACHIAL PLEXUS ROOTS* are *DERIVED FROM*:

*BRACHIAL PLEXUS ROOTS* ARE DERIVED FROM THE: *VENTRAL RAMI* OF *SPINAL NERVES C5-T1*

what is the only type of *NERVE ENDING* FOUND IN THE *PULP* ?

*FREE NERVE ENDING* IS THE ONLY TYPE OF *NERVE ENDING FOUND IN THE PULP* NOTE: *free nerve endings* regardless of the stimulation (HEAT, COLD, PRESSURE) the *ONLY RESPONSE IS PAIN!*

*PAIN ORIGINATES IN THE PULP* DUE TO:

*PAIN* ORIGINATES AT THE PULP DUE TO: *FREE NERVE ENDINGS contacting the ODONTOBLASTIC CELLS*

what are the *3 CORDS (TRUNKS)* of the *BRACHIAL PLEXUS* (indicate what they *GIVE RISE TO*)

THE *3 CORDS* OF THE *BRACHIAL PLEXUS*: 1.*POSTERIOR CORD*: gives rise to the *Axillary & Radial Nerve* branches. 2.*LATERAL CORD*: Forms the *Musculocutaneous nerve.* 3.*MEDIAL CORD*: Forms the *Ulnar Nerve*

which of these is located *DEEP ON THE SIDE OF THE NECK* A. BRACHIAL PLEXUS B. LUMBAR PLEXUS C. CERVICAL PLEXUS D. SACRAL PLEXUS

THE *CERVICAL PLEXUS* IS LOCATED *DEEP ON THE SIDE OF THE NECK* AT THE *(C1-C4)* POSITION - CERVICAL PLEXUS: *Sends out Numerous CUTANEOUS, MUSCULAR, and COMMUNICATION branches to the NECK, shoulder, and chest*

THE *DENTAL PULP* contains: A. MYLEINATED NERVE FIBERS B. UNMEYLINATED NERVE FIBERS C. DOES NOT CONTAIN NERVE FIBERS D. CONTAINS BOTH MYELINATED & UNMYELINATED NERVE FIBERS

THE *DENTAL PULP* CONTAINS: *BOTH MYELINATED & UNMYELINATED NERVE FIBERS* NOTE: 1. *FREE NERVE ENDING*: is the *only nerve found inside the pulp* 2. *Odontoblasts* Surround the pulp and SEPARATE it from DENTIN.

which of these is formed in the *PSOAS MUSCLE* A. BRACHIAL PLEXUS B. LUMBAR PLEXUS C. CERVICAL PLEXUS D. SACRAL PLEXUS

THE *LUMBAR PLEXUS (L1-L4)* IS FORMED IN THE *PSOAS MUSCLE*. It *supplies* the: *lower abdomen & parts of lower limbs*

during a *MID HUMERAL FRACTURE* WHICH NERVE IS MOST OFTEN INJURED*?

THE *RADIAL NERVE* IS MOST OFTEN INJURED DURING A *HUMERUS FRACTURE*