Brainstem

Brain stem consist of which components?

1. Medulla oblongata

2. Pons

3. Midbrain

4. Cerbellum

What is controlled by the corticobulbar tract?

and terminates where

1. The muscles of the face, head and neck

2. which terminates on motor neurons within brainstem motor nuclei.

List two Pyramidal Tracts

1. Corticospinal tracts - supplies the musculature of the body.

2. Corticobulbar tracts - supplies the musculature of the head and neck.

The corticospinal tract originates and terminates where?

originating from the cortex, is a white matter motor pathway starting at the cortex that terminates on motor neurons in the spinal cord,

corticospinal tract controlling movements of

the limbs and trunk

A bundle of axons in PNS is called

Nerve

A bundle of axons in CNS is called

tract

In the central nervous system (CNS), myelin is produced by

oligodendroglia cells

A peripheral nerve fiber consists of an

axon, myelin sheath, Schwann cells and its endoneurium.

Reticular formation has extensive connections with the cranial nerve nuclei, with the ______, and with _____ and _____ motor mechanisms, through which it influences _____, ______ and ______ tone.

1. cerebellum

2. brain stem

3. Spinal

4. Movement, posture and muscle

Reticular formation - Functions

1. Control over the level of consciousness,

2. the perception of pain and

3. regulation of the cardiovascular and respiratory systems.

The ________ is one of many ascending tracts, which carry received sensory information to the brain via the spinal cord.

gracile fasiculus

Midbrain: The dorsal aspect of the midbrain is marked by four paired elevations, the superior and inferior _____, which are parts of the visual and auditory systems, respectively.

colliculi

Medulla: prominent longitudinal columns, the _______ (bulges), run on either side of the ventral median fissure .

pyramids

Lateral to the pyramid lies an elongated elevation, the _____, within which lies the inferior olivary nucleus.

This has connections primarily with the cerebellum and is involved in the control of movement.

olive

Function of cerebellum -

balance, musc coordinaiton between mvoement,

The brain stem consists of the _____, ____, and _____

medulla oblongata, pons and midbrain.

The dorsal aspect of the rostral medulla and the pons form the ___________

floor of the fourth ventricle

The lateral and median apertures of the fourth ventricle permit the passage of CSF into the _________.

subarachnoid space

The inferior, middle and superior cerebellar peduncles connect the _____, ____, _____

1. cerebellum to the medulla,

2. pons

3. midbrain