A + P chapter 13

Which brain structure serves to regulate body temperature (ie: fever) and is the master Autonomic Nervous System (ANS) control center? 

Hypothalamus

The brainstem consists of which of the following?

pons, midbrain, medulla oblongata

The primary somatosensory cortex is located in the

parietal lobe

Spinocerebellar tracts

carry information about muscle stretch or tendon tension to the cerebellum

Subarachnoid space lies between which two layers of meninges?

arachnoid + pia

Cell bodies of sensory neurons are located in

dorsal root ganglia near spinal cord

Neural tract that conveys info to the brain concerning Pain & Temperature is called

Lateral spinothalamic tract

The conus medullaris is the bottom tip of the spinal cord at it's terminating point. Inferior to this lumbar & sacral nerves dangle down in a structure collectively referred to as the cauda equina ('horse's tail'). At which vertebral level does the conus medullaris typically reside at? 

Between L1 & L2

The canal connecting the 3rd & 4th ventricles of the brain is called the

cerebral aqueduct

T/F: The Lateral & Ventral Corticospinal tracts both cross the midline and control muscles on the contralateral side of origin.

false

T/F: The corticospinal tracts (lateral & ventral) consist of 3 neurons beginning at the cerebral cortex and ending at the effector organ muscle. 

false

This cranial nerve is purely motor & is responsible for voluntary tongue motor movements

CN XII (hypoglossal nerve)

Among other functions, this cranial nerve is responsible for autonomic innervation of the muscles involved in pupillary constriction.

CN III (oculomotor nerve)

This cranial nerve is responsible for general sensation of the face as well as the muscles of mastication

CN V (trigeminal nerve)

This cranial nerve provides innervation to 4 of the 6 voluntary skeletal muscles of eye movements (EOMs)

CN III (oculomotor nerve)

This cranial nerve is responsible for innervation of the muscles involved with the action of shrugging shoulders up to ears

CN XI (accessory nerve)

This cranial nerve is the only one that bypasses the thalamic relay center altogether. It goes straight to the limbic system/temporal lobe for immediate processing

CN I (olfactory nerve)

This cranial nerve is responsible for innervation of the muscles for facial expressions. (Smiling, frowning, frowning, ect.)

CN VII (facial nerve)

This cranial nerve provides general sensation to the oropharynx & posterior 1/3 of the tongue making it the sensory (afferent) arm of the gag reflex

CN IX (glossopharyngeal nerve)

This cranial nerve innervates 4 of the 5 muscles of the pharynx/throat making it the primary motor (efferent) arm of the gag reflex.

CN X (vagus nerve)

Which of the following is an unencapsulated tactile receptor? 

Free nerve endings

Which of the following is not a proprioceptor?

Tactile discs

An individual has a lesion that produces a hemisection of the right side of the spinal cord at level T3 (inferior to the brachial plexus). The symptoms that would be expected include:

loss of pain & temperature sensation on the left lower limb involving T4 and all lower spinal nerves.

Which of the following statements incorrectly describes and spinal nerves and nerve plexuses.

Spinal nerve C1 transmits somatosensory information to the nose.

What correctly describes spinal nerves and nerve plexuses?

Plexuses convey both somatosensory and motor signals from the chest, the abdomen, upper and lower extremities.

sensory receptors, based upon their modality of stimulus include all of the following:

thermoreceptors, nociceptors, photoreceptors, chemoreceptors, mechanoreceptors

Which receptor pathway is not a general sense?

Photoreceptor (Visual) pathway

Which of the following statements is incorrect when describing pain signal.

Nociceptive signals travel through the posterior funiculus–medial lemniscal pathway to the somatosensory cortex.

The anterior compartment of the thigh, quadriceps femoris, is innervated by which plexus?

Quadriceps: rectus femoris, vastus lateralis, vastus intermedius, vastus medialis

lumbar

Criteria for Classifying Sensory Receptors include all the following:

Sensory Receptor Distribution, Modality of Stimulus, Stimulus Orgin

Criteria for Classifying Sensory Receptors include all the following EXCEPT:

Encapsulated vs Unencapsulated

Which nerve from the brachial plexus causes contraction of the biceps brachialis muscle?

Musculocutaneous